CS601 Quiz-1 Solution Fall 2021 (1 to 1l3Lec)
In __________________, the instantaneous change in the carrier frequency is proportional to the derivative of the amplitude of the modulating signal.
Frequency
_________ layer is responsible for creating datagrams.
The data link layer
Voltage controlled oscillator(VCO) generates ________________ .
4 ways
Block coding can help in ____________at the receiver side.
Synchronization and error detection
At the application layer, object/information is in the form of ________.
Message
___________ is the first step in PCM technique
Sampling…confirm
Communication between two user in a cellular (Mobile) network is an example of __ communication
Full duplex….confirm
Transmission medium are of ______ types.
Two….confirm
A frequency is called ____ if sine wave changes with time
Infinte frequency…confirm
A frequency is called ____ if sine wave does not change with time
Zero frequency ….confirm
Open system interconnection (OSI) has __ number of layers.
7…confirm
8In unidirectional antenna, the common point where all the lines
intersect each other is ___.
Focus…confirm
To calculate the data rate for noisy channel ____ formula is used.
Shannon….confirm
Television broadcast where user can only view the information sent in
the form of video is an example of _______ communication.
Simplex
N= S*r is the formula for finding
Baud rate…..confirm
TCP/IP protocol suit has _______ layers.
5….confirm
Unit of phase is _______.
Degree….confirm
14.For a noiseless channel theoretical formula to calculate the data rate was developed by.
Nyquist…..confirm
In context of bandwidth-delay product the cross section of the pipe represents the ______.
Bandwidth…confirm
Uni polar Polar and Bipolar are types of _____ coding scheme.
Line…confirm
In ___ scheme the voltages are on both sides of the time axis and voltage level for 0 can be positive ant the voltage level for 1 can be negative.
Polar….confirm
In _______ transmission medium start and stop bits are used
Asynchronous….confirm from net
In layered architecture of network logical connection between layers means.
They are connected in peers…..confirm
OSI stands for _______.
Open system interconnection….confirm
Quadrature Amplitude Modulation is the mechanism of ______conversion.
Digital to analog…confirm
Writing used for transmission modes depends upon ______.
Data stream…confirm
The maximum bandwidth required for QAM transmission is the same as that required for _ and _______ transmission.
ASK, PSK
In optical fiber cable the ratio of the diameter of their core to the diameter of their cladding, both expressed in ______.
Micrometers…confirm
Radio waves are propagated in _____ whenever they are transmitted by an antenna.
All direction …confirm from net
_______component of data communication governs the overall communication on the network.
Transmission medium…confirm
In binary ASK, the peak amplitude of one signal level is 0 and the other is the same as the __________.
Amplitude
In _______ scheme, all the signal levels are on one side of the time axis, either above or below.
Unipolar…confirm from net
Simple sine wave can be used to send.
Amplitude
Paging system in data communication uses _______ waves.
Radio waves…confirm from net
Multipoint channel can be shared in _____ manner.
Both temporal and spartial…confirm
________ is an example of multipoint topology
Bus…confirm
Bandwidth can be measured in __________.
Bps…confirm
In____encoding scheme, we use three levels positive negative and zero
Bipolar…confirm from net
Header size _while moving down the layers at sending side
Decreases
________signals have limited number of discrete value
Digital….confirm
_______ is a block coding method
NRZ-1….confirm
Technique that allows the simultaneous transmission of multiple signals across a single data link, is known as ______.
Multiplexing….confirm
Simultaneous transmission of multiple signals across a single data link is called.
Multiplexing…confirm
Minimum bandwidth required for Manchester line coding scheme is_________.
1Mhz…confirm
AMI is a popular ______ encoding method.
Bi-polar….confirm
TCP/IP was presented by ________ in a research paper
Vin Cerf and bob Kahn…confirm
Among the following cables given below _____ cable has the cost as compared to others.
Medium….confirm
Among the following cables given below _____ cable has the lowest cast as compared to others.
Coaxial cable…confirm
Among the following cables given below _____ cable has the highest cast as compared to others.
Fiber optic cable…confirm
____________ is correct formula to determine the total number of ports needed for one system connected in a mesh network.
n-1….confirm
A twisted pair cable consists of ________ conductors
2 ….confirm
Packets travel in ____ layer of TCP/IP protocol suit
Network ….confirm from net
HDB3 falls under which coding scheme?
Bipolar…confirm
According to the Nyquist theorem, the sampling rate must be at least____ times the highest frequency contained in the signal.
2…..confirm
________ protocol suit is being used by the modern internet communication
TCP/IP…confirm
LF(low frequency) band is used in _______ propagation
Ground….confirm
____________ is a type of serial transmission in which data bits are transmitted as a continuous stream in time with a master clock, start bits, stop bits and gaps are not used. Transmitter and receiver time is sync.
Synchronous….confirm
Identify the correct formula to calculate Propagation time.
Propagation time= Distance/ propagation speed….confirm
The communication of the application, transport and network layer is _____
Physical…confirm
Frames travel in ______ layer of TCP/IP Protocol suite.
Data link
Manchester encoding scheme achieves the same level of synchronization as __________.
RZ…..confirm
In Manchester and differential Manchester encoding schemes, the signal rate is ______ than that of NRZ.
Double…confirm from net
In a bidirectional communication each layer performs two ____ tasks in each direction.
Opposite…confirm
______ is composed of thousands of interconnected networks expanded over large geographical area.
Local area network
Time taken by a periodic signal to complete one cycle is called.
Period…confirm from net
There are __ common scrambling technique
Two ….confirm
The bipolar encoding scheme was developed as an alternative of ____.
NRZ…confirm from net
FSK stands for _______.
Frequency shift keying….confirm
In ___ encoding scheme, the voltage level oscillates between a positive and a negative value although it may remain at zero level between the two values.
Polar…confirm from net
_________ is an example of transmitter.
Modem
The material used for conduction in twisted pair cable is _______.
Copper
RG-11 having impedance of 50 ohm is used in __________ Ethernet
Thin….confirm
_______ encoding scheme is somewhat a combination of the RZ and NRZ-l scheme
Manchester encoding…confirm from net
_______ has less electromagnetic interference as compared to other guided medium.
Unshielded Twisted Pair
Electromagnetic waves ranging in frequencies between ______ are called microwaves.
1 to 300 GHz
Switch is a _________ layer devices
Data link…confirm
_________is Shannon capacity formula to determine highest theoretically data rate for a noisy channel.
Capacity = Bandwidth * log2(1+SNR)….confirm
________is the range of frequencies contained in a composite signal.
Bandwidth…confirm
In PCM technique Quantization is an ______ process
Un-balanced
In Ring topology, each node has a point to point dedicated link with.
Exactly 2 nods….confirm
In _________ modulation process is used by the transmitting devices to shift their data to a specific carrier frequency for multiplexing.
Fdm…confirm
Five stations will have _____ full duplexed dedicated links among them to be connected in a Mesh topology.
10….confirm
Which of the following technique(s) is used for Analog-to-Digital Conversion. Both Pulse Code Modulation(PCM) and Delta
Modulation(DM)…confirm
The human voice normally frequency range from ________.
0 to 3000Hz
The layer of TCP/IP protocol suite which is on the top is known as________ layer.
Application…confirm
In __________ type of error, two or more bits in the data unit will bechanged.
Burst….confirm
________ is the process of converting digital data to digital signal.
Line coding…..confrim
Manchester encoding scheme uses and inversion at the _____ of each bit.
Middle….confirm
FF:FF:FF:FF:FF:FF is a ______ link layer address.
Broadcast…..confrim
A3 34 45 11 92 F1 is a _________ link layer address.
Data, unicast….confirm
High-Level Data Link Control(HDLC) defines ____ types of frames to deal with the transfer modes.
3…..confirm
____________ is the number of bits sent in 1 second
Bit rate(bps)…confirm
_________ Time required to send 1 single bit.
Bit interval…confirm
90._________ are used to transport user data and control information relating to user data
Information
frams(I-frames)…..confirm
_________are used only to transport control information
Supervisory frames(S-frames)…..confirm
___________are reserved for system Management
Unnumbered frames(U-frames)…..confirm
.__________ are used to exchange session management and control information between connected devices.
U-frames….confrim
In order to find Hamming distance between two pair of words _____logical operation is used.
XOR….confrim
Data Link layer receives services from the __________layer.
Physical
The ________ is the number of signal elements sent per unit time.
Bit rate…..confrim
In order to resolve link layer address of the next node, the first generated ARP request is always in ________ mode.
Broadcast
In Block coding we divide our message into blocks of k bits called as__________.
Data words…..confirm
To control and manage the transfer of data, a protocol called point to point (PPP) is used at the _______ layer
Data Link
In character oriented protocol, each character of frame is encoded using ____ coding system.
ASCII
Error detection and correction are the services provided by______ layer.
Data link layer ….confirm from net
______________ is used in the stop-and-wait protocol to overcome the issue of duplication. Frame sequencing and Acknowledgment
Numbering…confirm from net
Stop-and-weight protocol is used for _______.
Both flow and error control….confirm
Error correction is more _______ than the error detection
Difficult…confirm from net
Payload field of the PPP frame is of variable size and it can carry maximum data up to_________.
1500 bytes….confirm from net
If duration of noise is decreased during a transmission over noisy channel. Fixed data rate of the channel will cause ______ number of bits being impacted by the noise.
More….confirm from net
One of the most common protocols for point-to-point access is _________.
PPP…confirm
In linear Block codes ______ of two valid code words creates another valid code word.
XOR…confirm
Which layer is concerned with the syntax and semantics of info exchange between two systems?
Presentation
Traditionally MANs have been implemented using one of the 2 technologies, Circuit Switching and Packet Switching
false
In OSI model headers are added at layer _________.
6,5,4,3,2 only
________ works with topologies in which one drvice is designated as a primary station and the other devices are secondary stations.
Polling
Signals travel through fiber optic cable are in the form of ________.
Light…confirm from net
PSK is susceptible to the noise degradation.
False
What is the frequency of a sine wave if it completes one cycle in 5 seconds?
0.2
Which one is not the function of data link layer?
Line discipline
Error detection and correction are the services provided by ________ layer.
Data link layer
________ is not a function of Data Link Control.
Modulation
No matter whether the link is dedicated or broadcast, data link control (DLC) layer provides services between ________.
Two adjacent nodes
The inversion of the level represents a 1 bit in ______ encoding
NRZ-I
Guard bands are used in ________ multiplexing technique, guard bands to avoid overlapping of frequency bands assigned to each user.
FDM…confirm
The ________ protocol uses both flow and error control.
Stop-and-Wait
Each computer on the Internet has a unique numeric address called a(n) ___________.
IP address
WDM stands for _________.
Wave Division Multiplexing
A fiber -optic cable transmit signals in the form of ________.
Light
CDMA stands for ________.
Code Division Multiple Access
Quantization is a method of assigning ________ values in a specific range to sampled instances.
Integral
STP is more expensive than UTP and is less susceptible to noise.
True
In circuit switched networks we have low efficiency but minimal________.
Delay….confirm
Which level of the TCP/IP reference model routes data/information across a network channel?
Network Layer
A portion of the path that carries TX between a given pair of devices is known as ___________.
Channel
Digital signals are refered to be ___________.
Discrete
BSC supports ___________ transmission using ___________ flow control.
Half-duplex, Stop and wait ARQ
________ is the rate of change with respect to time.
Amplitude
The original Ethernet technology with the data rate of 10 Mbps is called ________?
Standard Ethernet
If we need to correct a single error in an 8-bit data unit, we need to consider ________ possible error locations.
16
In Pulse Code Modulation (PCM), the sampling is dependent on ________.
Amplitude…confirm
The extra bits added with the original data for error detection/correction are called ________. Redundant bits
Which of the following sublyer resolves the contention for the shared media?
MAC
PAP and CHAP are used by ______ as Authentication Protocols
PPP…confirm
Media Access Control (MAC) and Data link (DLC) constitute_______ layer
Data Link….confirm
In ________, each station sends a frame whenever it has a frame to send.
Slotted ALOHA
What is the period of a Sine wave having frequency of 10 Hz?
0.1
Is there any difference between Data communication and telecommunication are network?
No
In TCP/IP protocol suite, the process of adding header at each layer on sending side is known as ________.
Packetizing
________ is correct formula to determine the total number of ports needed for one system connected in a mesh network.
N-1
Following characteristics fully describe ___________,Amplitude, Period/Frequency, Phase
Sine Waves
What is the period of a Sine wave having frequency of 5 Hz?
0.2
The inversion of the level at 1 bit is called as ________.
NRZ-I
In ________, both peak amplitude and frequency remains constant as the phase changes.
PSK
At the CRC generator, ___________ added to the data unit before the divisional process.
0s are
In Pure ALOHA, the vulnerable time is ________ the frame transmission time.
Two times
In Block coding we divide our message into blocks of k bits called as ________.
Data words
Analog refers to something that is continuous in ___________.
Time
________ of a signal is the collection of all the component frequencies it contains.
Frequency spectrum
________ encoding is almost obsolete today
Unipolar
Which of the following is most affected by noise?
ASK
In _________, a signal is directed straight from antenna to antenna.
Line of sight propagation
To control and manage the transfer of data, a protocol called Point to Point Protocol (PPP) is used at the ________ layer.
Network
The level of signal is always positive in NRZ encoding.
false
________ signal can take infinite levels of intensity over time.
Analog….confirm from net
________ is sometimes called the bit rate.
Data rate…confirm from net
________ contains a repeater.
Active hub
________ is/are un-reliable protocol(s).
UDP
Low pass channel has ________ bandwidth between two stations.
Shared…confirm from net
The message 1110 sent by a source is received by a destination as 1011. This is ________ type of error.
Burst
TROPOSHERE is the layer of atmosphere above the troposphere but below space
False
In Pure ALOHA, the vulnerable time is ________ the frame transmission time.
Two times
Asynchronous transmission is ___________.
Slow
Radio is an example of _______ signal conversion.
Analog to analog
Which error detection method consists of a parity bit for each unit as well as an entire data unit of parity bits?
Longitudinal Red Check (LRC)
Session layer is responsible for _________.
Maintaining the connection
If duration of noise is decreased during a transmission over noisy channel, fixed data rate of the channel will cause ________ number of bits being impacted by the noise.
More
S-frames in High-Level Data Link Control (HDLC) are only used to transfer ________ information.
Control
In ASK, both ______ and ________ remain constant.
Frequency, Phase
Encoding digital data into digital signals is called ___________.
Digital-to-Digital Conversion
GO-BACK-N protocol is one of the ________ layer protocols,
which is used to control the flow of data during the transmission.
Network
In ASK correct formula for calculating the bandwidth is as ________.
B=(1+d)S….confirm
The type of ALOHA which improves the efficiency of Pure ALOHA is ________.
Slotted ALOHA
In which controlled-access method all data exchanges must be made through primary device even when the ultimate destination is a secondary device?
Polling
The __________ generates the data and passes it along with any control information to a __________.
DTE, DCE
________ is used in the Stop-and-Wait protocol to overcome the issue of duplication.
Frame sequencing and Acknowledgement numbering
Transmission Control Protocol is a(n) ________ layer protocol.
Network
The Internet is ___________.
a global network of computers networks
We can have ________ different groups with a 4 bit block.
8
Analog To Analog Conversion Methods include ___________.
AM, PM and FM
DLC in Data Link Layer stands for ________.
Data Link Control
What is the Bandwidth of a periodic signal if it is decomposed into 4 sine waves with frequencies 200, 400, 600 and 800?
600
________ category of coaxial cable is used for thin Ethernet.
RG-58….confirm
________ category of coaxial cable is used for thin Ethernet.
RG-8, RG-9, RG-11 …….confirm
________ category of coaxial cable is used for Cable TV
RG59….confirm
In ________, each station is allocated a time slot during which it can send data.
TDMA
________ transmission technology (based on Ethernet) provides a data rate of 1 billion bits per second.
10BASE-T Ethernet
Time domain plot show changes in signal phase with respect to time.
false
dB is negative if a signal is ___________.
Attenuated
Which of the following is not a characteristic of a sine wave?
Segmentation…confirm
What is the Bandwidth of a periodic signal if it is decomposed into 4 sine waves with frequencies 300, 600, 900 and 1200?
900
Asynchronous TDM is efficient only when the size of the time slot is kept relatively ___________.
Large
A sine wave is defined by ___________ characteristics.
3
Switch is a network device which operates on the ________ layer of the TCP/IP protocol suite.
Data link
In even parity check code, the value of syndrome is ________ if the number of 1s is even.
0
4Collisions in CSMA/CA are avoided through ________.
All of the given
Human voice is example of ___________ signal.
Analog
Time domain shows changes in ___________.
signal amplitude w.r.t time
Normally the value of Kmax in pure ALOHA is ________.
15
Central Hub in a Tree is an ___________.
Active hub
In selective-reject ARQ, only the specific damaged or lost frame is
________.
Retransmitted
208. If users must take turns using the link, then it is called Spatial Sharing.
false
At the CRC checker, ___________ means that the data unit is damaged.
A nonzero remainder
Digitizing an Analog Signal is called ___________.
Analog-to-Digital Conversion
WDM stands for ________.
Wavelength Division Multiplexing
What was the main draw back in ALOHA Random-Access method?
All of the given
YMODEM has ________ Byte of data unit.
1024
Like Data link layer, ___________ is also responsible for Flow control.
Transport Layer
In Block coding scheme, number of code words is always ________ data words.
Equal to
216. RZ stands for ___________.
Return ot Zero
Line Configuration refers to the way two or more devices attach to a ___________.
Link
The flag in PPP is a byte that needs to be ________ whenever it appears in the data section of the frame.
Escaped
At the Application layer, object/information is in the form of ________.
Packet
The term _______means that only one bit of a given data unit is changed from 1 to 0 or from 0 to 1.
Single Bit Error
What is the frequency of a sine wave if it completes one cycle in 2 seconds?
0.5
POST stand for ________?
Plain Old Telephone Service
To make sure that source does not overwhelm destination by sending data faster than it can be handled and processed is called?
Flow Control
If a digital signal has "L" number of levels. ________ is the number of bits required to represent each level.
Log base 2 L….confirm
In ASK, Noise usually affects the ________.
Amplitude
In order to find the location of two errors in an eight bit stream, we have to see ________ different combinations.
28
Which one of the following is not a Channelization Protocol?
CSMA
Which one of the following is a correct-access method?
Reservation
By using ___________ system, change in the file contents during file transmission can be avoided.
Error Detection and Correction
Radio wave transmission utilizes ___________ different types of propagation.
Five
A broadcast signal is received by the orbiting satellites which rebroadcasts ________.
none of the given
What is the period of a Sine wave having frequency of 2 Hz?
0.5
________ mode of serial transmission guarantees fixed rate of
data.
Isochronous…confirm from net Time division multiplexing is used in ________ systems.
Digital….confirm from net
The most common type of connector used by coaxial cable is ________.
BNC
Which of the following statement is correct?
Digital signals are less prone to Noise
In an analog hierarchy to carry voice channels, a group can carry ________ voice channels.
12(4khz)….confirm
In an analog hierarchy to carry 12 voice channels, 5 group ______
48kHz….confirm
In an analog hierarchy to carry 60 voice channels, a 10 super
group _________bandwidth
240kHz….confirm
In an analog hierarchy to carry 600 voice channels, a 6 Master
group _______
2.52Mhz….confirm
In an analog hierarchy to carry 3600 voice channels, a Jumbo
group _________
16,984MHz …..confirm
In line discipline after the data transmission, the sending system
finishes with an ________ frame.
EOT
Data is transmitted using light through a ___________ cable.
fiber-optic
Data Link layer provides services to the ________ layer.
Network
If the Hamming distance between sent and received code word is
________, then it shows that received data is corrupted. ?
0
________ is responsible for governing node to node
communication.
Data Link layer
Mr. Asif while sitting in Lahore is talking with his friend in Dubai
through Skype is an example of ________.
Metropolitan Area Network
In frequency shift keying, ________ remain(s) constant.
Both Peak amplitude and Phase …confirm
In Amplitude shift keying, ________ remain(s) constant.
Both frequency and phase…confirm
In Phase shift keying, ________ remain(s) constant.
Both peak amplitude and frequency…confirm
Analog signals are refers to be ___________
Continuous
Baud rate is greater than or equal to the bit rate.
False
. In statistical time division multiplexing, number of slots in frame
are less than ________.
Input lines…..confirm
________ are used to exchange session management and control information between connected devices.
U-frames
. Terminal, microprocessor, computer, printer or any other device that generates or consumes digital data is known as ___________
DTE
There are three types of Hubs that exist. Which of the following options correctly describes these three?
Passive, Active, Intelligent
Which of the following consist of just one redundant bit per data unit?
Simple Parity Check
In the encoding where positive to negative transition is one and vice versa is zero.
None of given option
Error correction is more ________ than the error detection.
Difficult
If the window size is 63 in go-back N ARQ then what is the range of sequence number?
0 to 63
________ is normally used where speed is priority in data transfer.
Hybrid transmission
In Synchronous TDM, Time slots are not same in number as input devices.
False
In analog transmission, the base signal is called the________.
Carrier Signal
In ___________ a dedicated communication path is established between two stations through the nodes of the network
Circuit switching
Which one of the following is a Random-Access protocol?
CDMA/CD
A ________ modem is used to connect two DTEs directly.
NULL
The flag in PPP is a byte that needs to be ________ whenever it appears in the data section of the frame.
Escaped
________ is an Authentication Protocol, which is used by the PPP to authenticate passwords.
PAP
In CRC there is no error if the remainder at the receiver is _______.
Zero
VCI address is ________ address in virtual circuit approach.
Global…confirm from net
________ is an Authentication Protocol, which uses two-step process to authenticate user information.
PAP
Possession of TOKEN gives the station the right to ________.
Send the data
The transmission medium that carries the message is referred to as the ___________.
Communication channel
Latency is made of ________ components.
Four….confirm
Sampling means measuring ____________ of signal at equal intervals
Amplitudes
Which error detection method uses one's complement arithmetic?
Checksum
To calculate the data rate for noisy channel ________ formula is used.
Shannon…..confirm
To calculate the data rate for noisless channel ________ formula is used.
Nyquist….confirm
Checksum is an error-detection technique that can be applied to a message of ________ length.
Any
In ________ each band is reserved for a specific ststion, and it belongs to the station all the time.
FDMA
Flow control is needed to prevent ________.
Overflow of the receiver buffer
Quadrature Amplitude Modulation (QAM) is the combination of ________ and ________.
FSK, PSK
Like 10 Base 5, 10 Base 2 is a ________ topology LAN.
Bus
In the ________ method, the stations in a network are orgamized in a logical ring.
Token-passing
Two or more computers connected so that they can communicate with each other and share information is called a ___________.
network
The logical connection between the peer layers is ________connection.
Direct….confirm from net
In CSMA/CA, ________ is the amount of time divided into slots.
Contention Window
________ relative measures the strength of two signals.
Decibal ….confirm
A sine wave is ___________.
periodic and continuous
There are __________types of guided media.
3
AM signal requires ___________ the BW of original signal
Twice
CHAP is an Authentication Protocol, which uses ________
process to authenticate user information.
Three-way
There are _________ types of serial transmission.
2
294. There are ________ basic categories of multiplexing.
3
Congestion Control is a feature of layer(s).
All mentioned
Most commonly used connector for twisted pair cable is ________.
RJ-45….confirm from net
___________ does not happen until all the data is transferred and
all of the resources are freed.
Switching
A local telephone network use _______network.
Circuit switched…confirm from net
Microwaves are _________.
Unidirectional ….confrim
_________have established standards for using these signals for communication between devices such as keyboards, mice, PCs and printers
Infrared waves…confirm from net
Datagram approach and virtual circuit approach are two popular approaches which lead us to ________.
Circuit switching….confirm
In circuit switching when two end devices ‘A’ and ‘B’ connects with each other they send ____ request.
Acceptance
In optical fiber a glass or plastic core is surrounded by a________.
Cladding…confirm
_______ are used for multicast communication, such as radio and television.
Radio waves…confirm
. DLC in data link layer stands for ____
Data Link control….confirm
In virtual Circuit network all packets follow __________ path
Dedicated
Multi mode technology has _______ main types for light propagating.
Two
If the message is going to pass through a packet-switched network. If can be divided into packets of __________.
Both fix and variable size
According to state, fewer than ______ crossbar points can be used at once.
25%
_________ and ________ are the two types of addressing in virtual circuit approach.
Local, Global
Cable TV networks use __________ cables
Coaxial….confirm from net
The size of the packet is determined by the network and__________.
Governing Protocol
In circuit switching total delay is combination of connection time. Data transfer time and _____________
Connection tear down time
Which one of the following is not among the required phases for the actual communication in a circuit-switched network?
Protocol
Electromagnetic waves ranging in frequencies between 1 and 300 GHz are called ________________.
Microwaves
If we increase the data rate of a transmission over noisy channel, fixed noise duration will cause ________ number of bits being impacted by the noise.
Less
In case of higher data rate, the number of impacted bits will be _______.
Higher
In baseband transmission, a digital signal is transmitted as__________.
Analog signal….confirm from net
________ Cable is used in wavelength division multiplexing.
Fiber optic….confirm from net
The ————— technique expands the bandwidth of a signal by replacing each data bit with n bits using a spreading code.
DSSS…confirm from net
When the bandwidth of a link is greater than combined bandwidths of the
Frequency division….confirm from net
According to the Fourier analysis, frequencies obtained after decomposition of no period.
Continuous……confirm from net
Router is a network device which operates on the __ layer of the TCP/IP protocol.
Network…confirm from net
Uni polar, polar and bipolar are the types of —————
NRZ-I….confirm from net
According to stats, lower than —————- crossbar point can be used at once .
25%....confirm from net
In ———– TDM, slots are dynamically allocated to the connected stations to improve bandwidth efficiency.
Statistical…confirm from net
In star based network comprising of four computers and on switch, total number of cables needed will be ———-
4…confirm from net
The conversion of analog sample of the signal into digital form is called ________ process.
Sampling and quantizing…confirm from net
On a communication link, different channels are separated by unused strips of bandwidth called as ————-.
Guard band
———— is an example of host in a network.
Computer…confirm from net
In ————— TDM, each input connection has an allotment in the output even if is not sending data.
Synchronous …confirm
————– coding scheme are useful for LAN but not for long ranges
Biphase…confirm
In ———– signal changes its shape or form.
Distortion…confirm
. —————- Protocol suite is being used by the modern internet communication.
TCP/IP…confirm from net
in NRZ-1 the signal is inverted if ————- is encountered.
1…confirm from net
Simultaneous transmission of multiple signal across a single data link is called——
Multiplexing..confirm from net
Two stations are connected via a secure link in which messages are encrypted from source to the destination message is called——————
Protocol
Which one of following is a scrambling coding technique?
B8ZS
According to the Fourier analysis, frequencies obtained after decomposition of digital signals are____________.
Discrete
_______ is the heart of blocking code.
Coding
Wireless transmission can be divided into_____ broad groups.
Three…confirm from net
Wiring used for transmission modes depends upon________.
Latency
If a digital transmission system is sending five bits in every half a second, the bit-rate of the system.
10 bps…confirm
If the message going to pass through a packet-switched network, it can be divided into packets of_________.
Both fix and Variable size
In an analogue hierarchy to carry voice channels, a group can carry _________voice channels.
12
In optical fiber a glass or plastic core is surrounded by a ___________.
Cladding
In transmission impairments ______________ noise occurs from other source like
Induced…confirm
___________ is a digital process that allows connections to share the high bandwidth of a link.
TDM
Bandwidth in hertz in the range of_________ contained in a composite signal.
Frequencies
LAN stands for ___________.
Local Area Network
Demultiplexer is a_________ device.
One to many
Mr. Asif while sitting in Lahore is linking with his friend in Dubai through Skype is a_____________.
Wide Area Network
In __________ modulation, frequency and amplitude remain constant.
Amplitude
In TDM based digital hierarchy used by the Telephone companies, DS-1 is a single digital channel of_________.
1.544 Mbps…confirm
In TDM based digital hierarchy used by the Telephone companies, DS-2 is a single digital channel of_________.
6.312 Mbps…confirm
In TDM based digital hierarchy used by the Telephone companies, DS-3 is a single digital channel of_________.
44.376MBps…confirm
In TDM based digital hierarchy used by the Telephone companies, DS-4 is a single digital channel of_________.
274.176 MBps…..confirm
The bandwidth-delay product defines the number of bits that can fill the ____________.
Link
If a digital-signals has four levels, then we need _____ bits to represent each level.
2
Routing is a function of____________ layer.
Network
_________ relatively measures the strength of two signals.
Decibel
Taking off the header from the message is called________.
Encryption
In frequency domain plot, which value is replaced with frequency?
Wavelength
_________ is the process of converting binary data to a digital signal.
Line coding
Low pass channel with ___________ bandwidth is not real and is used for theoretical modeling.
Narrow or wide…both are confirm
Unit of phase is________.
Degree
BFSK stands for_____________.
Binary Frequency Sift Key
____________ is NOT an example of connecting device.
TCP
Coaxial cables are categorized by their____________ ratings.
Radio Government (RG)….confirm
Which one of the following is not among the required phases for the actual communication in a circuit switched network
Protocol
A common bipolar encoding scheme is called ________.
AMI
A telephone line analog signal has got the bandwidth of ___________.
4 kHz…confirm
In __________ systems, resources are allocated on demand.
Circuit switching
A fiber-optic cable transmit signals in the form of_________.
Light
Composite wave can be used to send ____________.
Frequency
Routing is the function of _________ layer.
Network
A virtual-circuit network operates on ____________layer.
Datalink
In TCP\IP model, the Physical Layer exchanges data in the form of ___________.
Bits…confirm
_________ signal completes certain pattern in a specific amount of time.
Periodic
If a digital signal has four levels, the we need _________bits to represent.
2
We can have combination of___________ possible codes with a 5-bit code.
32
There are _________categories of multiplexing.
3
Top most organization that provides support for the Internet Standard process is called___________.
IETF
If the message is going to pass through a packet-switched network, it can be divided into packets of___________.
Both-fix and variable size
________ data moves faster and timing errors are less frequent because the transmitter and receiver time is synced.
Synchronous…confirm
In frequency modulation, the frequency of the oscillator changes according tothe_____________.
Input Voltage
Binary Amplitude Shift Keying also called as:
On-Off Keying
Bi-polar uses_________ voltage levels.
Two
In serial data transmission ________ data transmission mode can be cheap but slower.
Asynchronous
In star-based network comprising of four computers and one switch, total number of cable needed will be___________.
4
Parabolic antenna is used for_________ communication.
Microwave…confirm
In circuit switching total Delay is combination of Connection Time and____________.
Connection tear down time
Datagram switching is done on___________.
Network Layer
Token Ring was devised by____________.
IBM…confirm
In TDM based digital hierarchy used by the Telephone companies, DS-0 is a digital channel of______________.
64 kbps…confirm
____________can be published using Request for Comments (RFCs).
Internet Draft….confirm
In transmission impairments_______ noise occurs from the random motion of electrons in a wire.
Thermal noise…confirm
Which one of the following is among the required phases for the actual communication in a circuit switched network?
Data transfer
According to the Fourier analysis, frequencies obtained after decomposition of nonperiodic digital signals are___________.
Bit length
The most common type of connector used by the coaxial cable is______________.
BNC
When data is sent or received using___________ the data bits are organized in a specific order, since they can only be sent or received one after another.
Serial data transmission
__________have established standards for using these signals for communication between devices such as keyboards, mice, PCs, and printers.
Infrared waves
In case of Frequency shift key, the difference between two frequency is represented as____________.
2 delta….confirm
___________category of coaxial cable is used for thin Ethernet.
RG-58
Cellular telephone uses___________ waves for communication.
Radio waves
_________ layer is responsible for the creating of the datagrams.
Network
In virtual circuit approach when a frame enters a switch and when it leaves a switch its VCI always___________.
Remain the same
According to stats, fewer than_________ crossbar points can be used at once.
25%
Data format used at Transport layer of TCP\IP protocol suit is called__________.
Packet
A virtual circuit network operates on ___________ layer.
Application
If 32 bits are sent in two seconds then the bitrate for that signal is______________.
64 bps
____________ normally used for long-distance data transfer.
Both parallel and Serial data transmission
__________ is a block coding method.
8B\10B
TCP\IP was chosen to be the official protocol of internet ________________.
1983
To measure the data rate ___________ theoretically formula(s)Were developed.
Four
In FSK, Baud rate is less than or equal to _____________ rate.
Bit rate…..confirm
___________ signal is represented by the discrete values.
Digital
Electromagnetic waves ranging in frequencies between 3 kHz and 1 GHz are called_________.
Radio waves
Suppose a signal is amplitude then the value od decibel will be __________.
Positive
_________ technique does not follows analog conversion.
QAM
In Pulse Code Modulation (PCM), the sampling is dependent on_________.
Amplitude
________________ is the sub type of Time Division Multiplexing Technique.
Statistical TDM
Modulation of analog signal is needed if the medium is ______________ in nature.
Bandpass
Quadrature Amplitude Modulation (QAM) is the combination of____________ and
__________.
ASK-FSK
There _____________ components of data communication system.
5…confirm
QPSK stands for_____________.
Quadrature phase shift key
To calculate the data rate for noisy channel___________ formula is used.
Shannon
Binary Amplitude Shift Keying(ASK) is also called as:
On-Off Keying….confirm
Some manufacturers provide a special port called the__________.
IrDA
To calculate the data rate for noiseless channel ____________ formula is used.
Nyquist
Two PCs and one printer are connected in a network within a room, it is an example of_________.
LAN…confirm from net
Analog the following cables given, __________ cable provides highest bandwidth and less attenuation.
Fiber optical
To calculate the data for noisy channel_________ formula is used.
Shannon
In circuit switched networks we have low efficiency but minimal _____________.
Delay
Polar encoding scheme uses__________ voltage level.
2….confirm
TCP\IP protocol suit consists of __________ layers.
5…..confirm
Bandwidth in hertz is the range of__________ contained in a composite signal.
Frequencies….confirm
___________ is an example of a host in a network.
Computer
Set of rules to be followed for effective communication is called____________.
Protocol
_________ is NOT an example of a connecting device.
TCP
When an antenna transmits radio waves, they are propagated in ________________.
Only up and down direction
Which one of the following is not a bipolar encoding level?
One
___________and________ are the two types of addressing in virtual circuit approach.
Local, Global
In transmission implements____________ noise occurs from the effect of one wire on the other
Cross talk…confirm
In computer network the stations are connected to each other in such a way that each station is connected to every other station through dedicated links. This makes___________.
Bus
In scrambling coding scheme, the number of pulses replacing the bits will be______________?
Equal to pulses…..confirm
In the context of analog to analog signal conversation technique. “PM” Standsfor__________.
Phase modulation
______________ relatively measurement the strength of two signals.
Decibel
Datagram approach and circuit approach are two popular approaches which lead us
to__________.
Packet switching
In virtual circuit approach when frame enters a switch and when it leaves a switch its VCi always___________.
Remain the Same
________ means loss of energy in signal.
Attenuation
A local telephone network use ____________network.
Circuit switched
In Amplitude Shift Keying. _______of the signal is/are changed.
Amplitude
In frequency domain plot, which value is plot on Y-axis?
Amplitude….confirm
In pulse code modulation the term sampling can also be referred as____________.
Pulse Amplitude Modulation
In analog transmission of digital data, the required bandwidth is always proportional to the signal rate expect in ________ a digital to analog conversion technique.
ASK
WDM stands for____________.
Wavelength Division Multiplexing
____________ does not follows analog to analog conversion.
QAM
On a communication link, different channels are separates by unused strips of bandwidth called as___________.
Guard band
_______________ layer converts frames coming from Data Link Layer into bits and sends
Them on the transmission medium.
Physical
Wavelength binds the___________ of a simple sine wave to the propagation speed of the medium.
Period of the frequency book page 61
The bandwidth delay product define the number of bits that can fill the_____________.
Network
The size of the packet determined by the network and _______________.
Governing protocol
To improve the performance of line coding __________coding was……?
Block coding…confirm
Which one of the following is not a sampling technique?
Neutral sampling
___________is normally used where speed is priority in data transfer.
Hybrid transmission
In a computer network, five stations are connected to each other in such a way that each station is connected to every other station through dedicated links. This makes____________ topology.
Mesh…confirm
Some manufacturer provide a special port called the_________port that allows a wireless keyboard to communicate with a PC.
IrDA
Current technology supports______________ modes for propagation of light.
Two
We quantize the sampling output into certain levels based on range of___________ and required accuracy.
Amplitude….confirm
_____________is the Nyquist bit rate formula for noiseless channel.
BitRate=2*Bandwidth*log2 L…confirm
A frequency is called ___________, if the rate of change in sine wave Is Instantaneous.
Infinite frequency book page 59
Which multiplexing technique involves signals composed of light beams?
WDM….confirm
__________ is a multiplexing technique which shifts each signal to a different carrier frequency.
FDM…confirm
Entire band in United States is regulated by_________ authorities.
FCC
__________ signals can take infinite levels of intensity over time.
Analog
Bi-polar uses_________ voltage levels.
Two
In serial data transmission ________ data transmission mode can be cheap but slower.
Asynchronous
In star-based network comprising of four computers and one switch, total number of cable needed will be___________.
4
Parabolic antenna is used for_________ communication.
Microwave
In circuit switching total Delay is combination of Connection Time and____________.
Connection tear down time
Guard bands are used in _________ multiplexing technique, to avoid overlapping of frequency bands assigned to each user.
FDM
Datagram switching is done on___________.
Network Layer
Token Ring was devised by____________.
IBM
In TDM based digital hierarchy used by the Telephone companies, DS-0 is a digital channel of______________.
1.544 Mbps
____________can be published using Request for Comments (RFCs).
Internet Draft
In transmission impairments_______ noise occurs from the random motion of electrons in a wire.
Thermal noise
In ASK correct formula for calculating the bandwidth is as_____________- B=(1*d)S
Which one of the following is among the required phases for the actual communication in a circuit switched network?
Data transfer
According to the Fourier analysis, frequencies obtained after decomposition of non-periodic digital signals are___________.
Bit length
The most common type of connector used by the coaxial cable is______________.
BNC
When data is sent or received using___________ the data bits are organized in a specific order, since they
Serial data transmission
__________have established standards for using these signals for communication between devices such as keyboards, mice, PCs, and printers.
Infrared waves
In case of Frequency shift key, the difference between two frequency is represented as____________.
2
___________category of coaxial cable is used for thin Ethernet.
RG-58
Cellular telephone uses___________ waves for communication.
Radio waves
___________mode of serial transmission guarantees fixed rate data.
Isochronous
Router is a network device which operates on the__________ layers of the TCP\IP protocol suit.
Network
_________ layer is responsible for the creating of the datagrams.
Network
In virtual circuit approach when a frame enters a switch and when it leaves a switch its VCI always___________.
Remain the same
According to stats, fewer than_________ crossbar points can be used at once.
25%
Data format used at Transport layer of TCP\IP protocol suit is called__________.
Packet
A virtual circuit network operates on ___________ layer.
Application
Cable TV networks use____________ cables.
Coaxial
____________ normally used for long-distance data transfer.
Both parallel and Serial data transmission
__________ is a block coding method.
8B\10B
TCP\IP was chosen to be the official protocol of internet ________________.
1983
To measure the data rate ___________ theoretically formula(s)Were developed.
Four
In FSK, Baud rate is less than or equal to _____________ rate.
None of these Given
___________ signal is represented by the discrete values.
Digital
Electromagnetic waves ranging in frequencies between 3 kHz and 1 GHz are called_________.
Radio waves
Suppose a signal is amplitude then the value od decibel will be __________.
Positive
_________ technique does not follows analog conversion.
QAM
In Pulse Code Modulation (PCM), the sampling is dependent on_________.
Amplitude
________________ is the sub type of Time Division Multiplexing Technique.
Statistical TDM
Modulation of analog signal is needed if the medium is ______________ in nature.
Band pass
Quadrature Amplitude Modulation (QAM) is the combination of____________ and __________.
ASK-FSK
There _____________ components of data communication system.
5
QPSK stands for_____________.
Quadrature phase shift key
To calculate the data rate for noisy channel___________ formula is used.
Shannon
Most commonly used connector for twisted pair cable is ______________.
RJ-45
Binary Amplitude Shift Keying is also called as:
On-Off Keying
Some manufacturers provide a special port called the__________.
IrDA
To calculate the data rate for noiseless channel ____________ formula is used.
Nyquist
Two PCs and one printer are connected in a network within a room, it is an example of _________.
LAN
Analog the following cables given, __________ cable provides highest bandwidth and less attenuation.
Fiber optical
To calculate the data for noisy channel_________ formula is used.
Shannon
In circuit switched networks we have low efficiency but minimal _____________.
Delay
Signals travel through fiber optic cable are in the form of___________.
Light
Polar encoding scheme uses__________ voltage level.
1
TCP\IP protocol suit consists of __________ layers.
5
Bandwidth in hertz is the range of__________ contained in a composite signal.
Frequencies
___________ is an example of a host in a network.
Computer
Set of rules to be followed for effective communication is called____________.
Protocol
_________ is NOT an example of a connecting device.
TCP
When an antenna transmits radio waves, they are propagated in ________________.
Only up and down direction
Which one of the following is not a bipolar encoding level?
One
___________and________ are the two types of addressing in virtual circuit approach.
Local, Global
In transmission implements____________ noise occurs from other sources like motors and appliances etc.
Cross talk
In computer network the stations are connected to each other in such a way that each station is connected to every other station through dedicated links. This makes___________.
Bus
In scrambling coding scheme, the number of pulses replacing the bits will be______________?
Equal to pulses
In the context of analog to analog signal conversation technique. “PM” Stands for__________.
Phase modulation
______________ relatively measurement the strength of two signals.
Decibel
Datagram approach and circuit approach are two popular approaches which lead us to__________.
Packet switching
If data is to be 1 Mbps then what will be the minimum bandwidth required for NRZ-I coding scheme?
500khz
In virtual circuit approach when frame enters a switch and when it leaves a switch its VCi always___________.
Remain the Same
A common bipolar coding scheme is called__________.
AMI
________ means loss of energy in signal.
Attenuation
The conversion of analog simple of the signal into digital form is called _____________ process.
Sampling
A local telephone network use ____________network.
Circuit switched
In Amplitude Shift Keying. _______of the signal is/are changed.
Amplitude
In frequency domain plot, which value is plot on Y-axis?
Amplitude
In pulse code modulation the term sampling can also be referred as____________.
Pulse Amplitude Modulation
Switch is a network device which operates on the _______________layer of TCP/IP protocol suit.
Data link
In analog transmission of digital data, the required bandwidth is always proportional to the signal rate expect in ________ a digital to analog conversion technique.
ASK
WDM stands for____________.
Wavelength Division Multiplexing
____________ does not follows analog to analog conversion.
QAM
On a communication link, different channels are separates by unused strips of bandwidth called as___________.
Guard band
_______________ layer converts frames coming from Data Link Layer into bits and sends
Them on the transmission medium
Physical
Wavelength binds the___________ of a simple sine wave to the propagation speed of the medium.
Period of the frequency
The bandwidth delay product define the number of bits that can fill the_____________.
Network
The size of the packet determined by the network and _______________.
Governing protocol
To improve the performance of line coding __________coding was……?
Block coding
Which one of the following is not a sampling technique?
Neutral sampling
___________is normally used where speed is priority in data transfer.
Hybrid transmission
In a computer network, five stations are connected to each other in such a way that each station is connected to every other station through dedicated links. This makes____________ topology.
Mesh
Some manufacturer provide a special port called the_________port that allows a wireless keyboard to communicate with a PC.
IrDA
Current technology supports______________ modes for propagation of light.
Two
We quantize the sampling output into certain levels based on range of___________ and required accuracy.
Amplitude
_____________is the Nyquist bit rate formula for noiseless channel.
BitRate=2*Bandwidth*log2 L
A frequency is called ___________, if the rate of change in sine wave Is Instantaneous.
Infinite frequency
Which multiplexing technique involves signals composed of light beams?
WDM
__________ is a multiplexing technique which shifts each signal to a different carrier frequency.
FDM
Entire band in United States is regulated by_________ authorities.
FCC
Two stations are connected via a secure link in which messages are encrypted from source to the destination message is called——————
Protocol
Simultaneous transmission of multiple signal across a single data link is called——-
Multiplexing
In NRZ-1 the signal is inverted if ————- is encountered.
1
—————- Protocol suite is being used by the modern internet communication.
TCP/IP
In the frequency shift keying, ————- remain(s) constant.
Amplitude
In ———– signal changes its shape or form.
Distortion
————– coding scheme are useful for LAN but not for long ranges.
Biphase
In ————— TDM, each input connection has an allotment in the output even if is not sending data.
Synchronous
——————- is a type of serial transmission in which data bits are transmitted as a continues stream in time with a master clock. Start bits, stop bits, and gaps are not used. Transmitter and receiver time is sync.
Isochronous
————- Relative measures the strength of two signals.
Decibel
When the bandwidth of a link is greater than the combined bandwidths of the signals, we use —————- multiplexing.
Frequency division
———— is an example of host in a network.
Computer
On a communication link, different channels are separated by unused strips of bandwidth called as ————-.
Guard band
The conversion of analog sample of the signal into digital form is called ———— process.
Quantizing and sampling
In star based network comprising of four computers and on switch, total number of cables needed will be ———-
4
The logical connection between the peer layers is ———- connection.
Direct
In ———– TDM, slots are dynamically allocated to the connected stations to improve bandwidth efficiency.
Statistical
According to stats, lower than —————- crossbar point can be used at once 25%
————– Category of coaxial cable is used for cable TV.
RG-59
————– is sometimes called the bit rate.
Data rate
Uni polar, polar and bipolar are the types of —————
NRZ-I
Router is a network device which operates on the ———— layer of the TCP/IP protocol.
Network
According to the Fourier analysis, frequencies obtained after decomposition of no period.
Continuous
When the bandwidth of a link is greater than combined bandwidths of the
Frequency division
The ————— technique expands the bandwidth of a signal by replacing each data bit with n bits using a spreading code.
DSSS
———– Cable is used in wavelength division multiplexing.
Fiber optic
VCI address is ———— address in virtual circuit approach.
Global
In baseband transmission, a digital signal is transmitted as ————.
Digital signal
telephone network use —————- network.
Circuit switched
Entire band in United states is regulated by ————— authorities.
FCC
————– are used for multicast communication, such as radio and television.
Radio waves
To calculate the data rate foe noiseless channel ———— formula is used-Nyquist
In an analogue hierarchy to carry voice channels, a super group _____________ bandwidth.
60kHz
Which one of following is a scrambling coding technique?
B8ZS
B8SZ
B08SZ
BZ8S
According to the Fourier analysis, frequencies obtained after decomposition of digital signals are____________.
Continuous
Discrete
Bit length
Homogeneous
Low pass channel has_______ bandwidth between two stations.
Dedicated
Shared
Multiplexed
Infinite
_______ is the heart of blocking code.
Coding
Division
Substitution
Multiplication
Wireless transmission can be divided into_____ broad groups.
Two
Three
Four
Five
Wiring used for transmission modes depends upon________.
Latency
Data Stream
Data sniffing
Packet Tracing
If a digital transmission system is sending five bits in every half a second, the bit-rate of the system.
5 bps
10 Hz
0.2 bps
10 bps
If the message going to pass through a packet-switched network, it can be divided into packets of_________.
Fixed size
Variable size
Both fix and Variable size
None
In an analogue hierarchy to carry voice channels, a group can carry _________voice channels.
60
12
20
10
QUESTION: In optical fiber a glass or plastic core is surrounded by a ___________.
Cladding
Outer conductor shield
Inner Conductor shield
Insulator
In transmission impairments ______________ noise occurs from other sourcelike
Impulse
Induced
Cross talk
Thermal
___________ is a digital process that allows connections to share the high bandwidth of a link.
FDM
TDM
WDM
None of the choices is correct
Bandwidth in hertz in the range of_________ contained in a composite signal.
Signals
Phases
Amplitudes
Frequencies
LAN stands for ___________.
Logical area network
Long-distance Area Network
Local Area Network
Long Area Network
Demultiplexer is a_________ device.
One to many
Many to many
One to one
Many to many
Mr. Asif while sitting in Lahore is linking with his friend in Dubai through Skype is a_____________.
Local Area Network
Metropolitan Area Network
Wide Area Network
Home Based Network
In __________ modulation, frequency and amplitude remain constant.
Phase
Frequency
Amplitude
Quadrature
The bandwidth-delay product defines the number of bits that can fill the ____________.
Link
Network
Hub
Switch
If a digital-signals has four levels, then we need _____ bits to represent each level.
2
3
4
5
Routing is a function of____________ layer.
Network
Physical
Transport
Datalink
_________ relatively measures the strength of two signals.
Signal rate
Bit rate
Decibel
Pulse rate
Taking off the header from the message is called________.
Layering
Encryption
Decapsulation
Stuffing
Which of the following is not a characteristic of a sine wave?
Amplitude
Segmentation
Phase
Frequency
In frequency domain plot, which value is replaced with frequency?
Wavelength
Amplitude
Phase
Time
_________ is the process of converting binary data to a digital signal.
QAM
ASK
FSK
Line coding
Low pass channel with ___________ bandwidth is not real and is used for theoretical modeling.
Multiplex
Infinite
Ethernet
Narrow
HDB3 falls under which coding scheme?
Bipolar
Bi phase
Line
Block
Unit of phase is________.
Bits per second
Watts
Bauds
Degree
BFSK stands for_____________.
Baud Frequency Shift Key
Binary Frequency Sift Key
Barrier Frequency Shift Key
Bridge Frequency Shift Key
____________ is NOT an example of connecting device.
Bridge
Router
TCP
Switch
Coaxial cables are categorized by their____________ ratings.
Electronic Industries Association (EIA)
Amplitude modulation (AM)
Frequency modulation (FM)
Radio Government (RG)
_________ is Shannon capacity formula to determine highest theoretically data rate for a noisy channel.
Capacity=Bandwidth*(1+SNR)
Capacity=Bandwidth*log2(2+SNR)
Capacity=Bandwidth*log2(SNR)
Capacity=Bandwidth*log2(1+SNR)
Which one of the following is not among the required phases for the actual communication in a circuit switched network?
Setup
Data transfer
Protocol
Connection teardown
A common bipolar encoding scheme is called ________.
AMI
NRZ
RZ
QAM
A telephone line analog signal has got the bandwidth of ___________.
8 kHz
2 kHz
16 kHz
4 kHz
In __________ systems, resources are allocated on demand.
Frequency switching
Line switching
Circuit switching
Packet switching
A fiber-optic cable transmit signals in the form of_________.
Light
Sound
Waves
None of the given
Composite wave can be used to send ____________.
Bandwidth
Telephone
Amplitude
Frequency
Routing is the function of _________ layer.
Network
Physical
Transport
Data link
A virtual-circuit network operates on ____________layer.
Datalink
Network
Physical
Application
In TCP\IP model, the Physical Layer exchanges data in the form of ___________.
Packets
Frames
Bits
Segments
_________ signal completes certain pattern in a specific amount of time.
Non-periodic
Periodic
A Periodic
Wavelength
If a digital signal has four levels, the we need _________bits to represent.
2
3
4
5
We can have combination of___________ possible codes with a 5-bit code.
4
8
18
32
There are _________categories of multiplexing.
2
3
7
5
Top most organization that provides support for the Internet Standard process is called___________.
Internet Society (ISOC)
Internet Architecture Board (IAB)
IETF
IRTF
If the message is going to pass through a packet-switched network, it can be divided into packets of___________.
Fixed size
Variable size
Both-fix and variable size
None
________ data moves faster and timing errors are less frequent because the transmitter and receiver time is synced.
Synchronous
Asynchronous
Isochronous
Metachronous
In frequency modulation, the frequency of the oscillator changes according to the_____________.
Output Voltage
Output Frequency
Input Voltage
Output Phases
Binary Amplitude Shift Keying also called as:
Dual Keying
On-In Keying
On-Off Keying
In-Out Keying
Thanks everone