cs601 collection of old papers

8/8/2019 Cs601 Collection of Old Papers

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FINAL TERM EXAMINATION

SEMESTER FALL 2004

CS601-DATA COMMUNICATION

Total Marks:60

Duration:120min

StudentID/LoginID

Name

PVC Name/Code

Date

Maximum Time Allowed: (2 Hours)

Please read the following instructions carefully before attempting any question:

1. This examination is closed book, closed notes, closed neighbors.

2. Answ er all questions.

a. There is no choice.

b. You will have to answer correctly all questions in this examination to get themaximum possible marks.

3. Do not ask any questions about the contents of this examination from anyone.

a. If you think that there is something wrong w ith any of the questions, attempt it tothe best of your understanding.

b. If you believe that some essential piece of information is missing, make anappropriate assumption and use it to solve the problem.

4. Examination also consists of multiple-choice questions. Choose only one choice as youranswer.

a. If you believe that two (or more) of the choices are the correct ones for a particularquestion, choose the best one.

b. On the other hand, if you believe that all of the choices provided for a particularquestion are the w rong ones, select the one that appears to you as being the leastwrong.

**WARNING: Please note that Virtual University takes serious note of unfair means.Anyone found involved in cheating will get an `F` grade in this course.

For Teachers use only


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Question Q1 Q2 Q3 Q4 MCQs Total

Marks

Question No: 1 Marks:12

Apply the Hamming code algorithm to transmit the seven bit data 1100111. Invert the 4 th bit of thetransmitted data and prove it at receiving end. The combination used to calculate each of the four r valuesfor a seven bit data sequence are as follows:

r1: bits 1, 3, 5, 7, 9, 11r2: bits 2, 3, 6, 7, 10, 11r3: bits 4, 5, 6, 7r4: bits 8, 9, 10, 11


Describe the following functions of transport layer of OSI model?

1) Service-point addressing2) Connection Control


Solve the following. Show all the work to get full credit.

1) If a periodic signal is decomposed into five sine waves with frequencies 1000, 2000,3000,4000,5000Hz, what is the bandwidth?

2) What is the bit rate of the following signals?a. A signal in which bit lasts for 0.001 seconds

b. A signal in which bit lasts for 2ms


Briefly answer the following questions.

1) Give three examples each of Guided and Unguided Transmission Media?2) Briefly describe how even parity and odd parity work?

Question No: 5 Marks: 2

In fiber optics, the signal source is __________ waves.

light

radio

infrared

very low frequency



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Wave division multiplexing (WDM) is conceptually the same as FDM, except that the multiplexing anddemultiplexing involve _________ signals.

analog

light

digital

periodic


Local loop is a connection between _______________ and ______________.

Subscribers handset and exchange

exchange and T-Lines

exchange and E-Lines

None of the above


In vertical redundancy check (VRC) a __________ bit is added to every data unit.

synchronization

framing

parity

interleaving


In cyclic redundancy checking, what is CRC?

The divisor

The remainder

The quotient


4/50

The dividend


Which error detection method involves polynomials?

CRC

VRC

LRC

Checksum


In stop and wait ARQ, if data 1 has an error, the receiver sends a ________ frame.

NAK

NAK 0

NAK 1

NAK 2

Question No: 12 Marks: 2Poll/Select line discipline requires _____________ to identify the packet recipient.

an address

a timer

a buffer

a dedicated line


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FINALTERM EXAMINATION

FALL 2006

CS601 - DATA COMMUNICATION

Marks: 70

Time: 120min

StudentID/LoginID: ______________________________

Student Name: ______________________________

Center Name/Code: ______________________________

Exam Date:

Please read the following instructions carefully before attempting any question:1. This examination is closed boo k, closed notes, closed neighbors.2. Answ er all questions.

a) There is no choice.b) You w ill have to answer correctly all questions in this examination to get the

maximum possible marks.3. Do not ask any questions abo ut the contents of this examination from anyone.

a) If you think that there is something w rong w ith any of the questions, attemptit to the best of your understanding.

b) If you b elieve that some essential piece of information is missing , make anappropriate assumption and use it to solve the problem.

4. Choose only one choice as your answ er in the multiple choice question s.a) If you believe that tw o (or more) of the choices are the correct ones for a

particular question, choose the best one.b) On the other hand, if you believe that all of the choices provided for a

particular question are the w rong ones, select the one that appears to you asbeing the least wrong.

c) Objective question is compulsory5. Calculator is allow ed.


For Teacher's use only

Question 1 2 3 4 5 6 7 8 9 10 TotalMarksQuestion 11 12 13

Marks

Question No: 1 ( Marks: 1 ) - Please choose one

OSI standard is practically implemented in the form of internet.

TRUE


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FALSE


TCP/IP application layers combine the functions of OSI Application, Session and Transportlayers.

TRUE

FALSE


Unipolar use one voltage levels.

TRUE

FALSE


The material of core and cladding in fiber optic cable is same.

TRUE

FALSE


Burst error is easily corrected then bit error.

TRUE

FALSE


Set of rules governing communication is known as

OSI model

Protocol

Medium


WDM(wave division multiplexing) deals with

electric waves


7/50

light waves

both


A Null modem is a

traditional modem

technique to connect two DTE

both


Router work on

data link layer

physical layer

network layer


Poll/Select is a technique related with

line control

line discipline

error control

Question No: 11 ( Marks: 20 )

A) Summarize the function of network support layers in OSI reference model? [12Marks]

B) An analog signal carries 4 bits in each signal element. If 1000 signal elements are sent persecond, find the Baud Rate and Bit Rate? [8 Marks]


A) What is the range of microwave? Explain microwave transmission and its types? [10


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Marks]

B) Write a Brief transmission impairments. [10 Marks]


A) Give exact mechanism and applications of token ring/bus and FDDI? [10 Marks]

B) A TELEPHONE line normally has bandwidth of 3000 Hz, the signal to noise ratio isusually 35dB.calculate the capacity of the channel? [10 Marks]


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In cyclic redundancy checking, what is the CRC?

Question No. 1 Marks : 02

Total Marks: 66 Total Questions: 10

**WARNING: Please note that Virtual University takes serious noteof unfair means. Anyone found involved in cheating will get an `F`

grade in this course.

b. On the other hand, if you believe that all of the choicesprovided for a particular question are the w rong ones, selectthe one that appears to you as being the least wrong.

a. If you believe that two (or more) of the choices are the correctones for a particular question, choose the best one.

4. Examination also consists of multiple-choice questions. Chooseonly one choice as your answer.

b. If you believe that some essential piece of information ismissing, make an appropriate assumption and use it to solvethe problem.

a. If you think that there is something wrong with any of thequestions, attempt it to the best of your understanding.

3. Do not ask any questions about the contents of this examinationfrom anyone.

b. You w ill have to answer correctly all questions in thisexamination to get the maximum possible marks.

a. There is no choice.2. Answ er all questions.1. This examination is closed book, closed notes, closed neighbors.

Please read the following instructions carefully before attempting anyquestion:

Time Allow ed: 150 MinutesFinal Term Examination Spring 2005

CS601 Data Communication

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r8: bits 8, 9, 10, 11r4: bits 4, 5, 6, 7r2: bits 2, 3, 6, 7, 10, 11r1: bits 1, 3, 5, 7, 9, 11

Apply the Hamming code algorithm to transmit the seven bit data 1101010. Invertthe 6 th bit of the transmitted data and prove it at receiving end. The combinations

used to calculate each of the four r values for a seven bit data sequence are asfollows:


Explain your answer with the help of simple diagram.2) when an acknowledgement lost1) when a data frame lostHow Go-Back-n ARQ method of Error Control works?


o Tree Topology

Mesh Topology oo Star Topology

o Ring Topology

Each device has a dedicated point to point line configuration only with the twodevices on either side of it.


o

Infrared oo Very Low frequency

o Radio o Light

In fiber optics the signal source is ____________waves.


o the remainder o the dividend o the quotient o the divisor


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Note: In an asynchronous system, if we have 'n' input lines, the frame contains nomore than 'm' slots, where m is less than n.

2) Asynchronous TDM1) Synchronous TDM

Draw the transmitted frames using the following multiplexing techniques:


o Phase o Bit interval o Bandwidth o Amplitude

The _____________of a signal is the width of the frequency spectrum.


o None of the above o

Asynchronous TDM

o Synchronous TDM o FDM

Which multiplexing technique shifts each signal to a different carrier frequency?


Phase oo Wavelength

o

Bandwidth

o Decibel

Measures the relative strengths of two signals



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An analog signal carries 7 bits in each signal element. If 1550 signal elements aresent per second. Find the baud rate and bit rate.



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Mesh

hich topology requires a multipoint connection?W


r4: bits 4, 5, 6, 7r8: bits 8, 9, 10, 11

r2: bits 2, 3, 6, 7, r1: bits 1, 3, 5, 7, 9, 11

10, 11

cbit of the transmitted data and prove it at receiving end. The combination used to

alculate each of the four r values for a seven bit data sequence are as follows:

thApply the Hamming code algorithm to transmit the seven bit data 1101101. Invert the4


Phase Time

Freque Amplitude

ncy

I

uestion No. 2

n a time-domain plot, the vertical axis is the measure of ________.Q Marks : 2

CRC Checksum

Two-d Simple parity check

imensional parity check

hich error detection method uses ones complement arithmetic?W


Time Allow ed: 150 Minutes Final Term Examination Spring 2006



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An ARQ A NAK An ACK A data frame

A timer is set when ___________ is (are) sent out.


1 1 0 0 1 1 0 0 1 1

b) Encode the given bit stream using Alternate Mark Inversion (AMI) scheme of

Encoding. [10]

1 0 1 0 1 0 1 0 1 0

a) Encode the given bit stream using Return to Zero (RZ) scheme of Encoding. [10]


b) 1010010a) 1110101

Apply the checksum error detection technique at sending end to the following two bitstreams. If there is no error, prove at the receiving end that the pattern is OK.


d. Frames 5, 6 and 7 are sent; frames 4 through 7 are acknowledge.c. Frames 3, 4 and 5 are sent; frame 4 is acknowledged; timer for frame 5 expires.b. Frames 1 and 2 are sent; frame 1 and 2 are acknowledged.a. Frame 0 is sent; frame 0 is acknowledged.

Draw the sender and receiver windows for a system using Go-Back-N ARQ, given thefollowing:


Ring Bus Star


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110111111 1010110

111111110

111111011

If the data unit is 111111, the divisor 1010, and the remainder 110, what is thedividend at the receiver?


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FINALTERM EXAMINATION

Spring 2009CS601- Data Communication

Question No: 1 ( Marks: 1 ) - Please choose on e

There are how many factors on which the performance of a network depends?

Three

Five

Four

Two


_________requires the maximum number of I/O ports.

Bus

Star

Mesh

Ring


Headers are added at layers 1 and 7 of OSI model.

True

False


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Trailer is only added at ________layer of OSI model.

data link

physical

network

application


A sine wave must be an analog signal.

True

False


If there is __________in voltage then the frequency is infinite.

instantaneous change

continuous change

no change


The inversion of the level at 1 bit is called as __________

NRZ-L

NRZ-I



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RZ


The last process in PCM is _________ digital data into digital signal.

encoding

decoding

modulating


Amplitude in ASK is more resistive to EMI and Noise.

True

False


If FCC regulations are followed, the carrier frequencies of adjacent AM radiostations are ____________ apart.

5 KHz

10 KHz

200 KHz

530 KHz



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In _____________ transmission, a start bit and a stop bit frame a character byte.

Asynchronous serial

Synchronous serial

Parallel

Asynchronous & Synchronous serial


Synchronous transmission have _____________.

a start bit

a stop bit

gaps between bytes

none of the given


Transmission media are usually categorized as _____________

Fixed or Unfixed

Guided or Unguided

Determinate or Indeterminate

Metallic or Nonmetallic




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The RG number gives us information about ________.

Twisted pairs

Coaxial cables

Optical fibers

all of the given


Radio wave and microwave frequencies range from _________.

3 to 300 KHz

300 KHz to300 KHz to 3 GHz

3 KHz to 300 GHz

3 KHz to 3000 GHz


All of popular Fiber optic connectors are ___________ shaped.

Conical

Barrel

Circular

Rectangular




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In ______________ method a signal can be directed in a straight from Antennato antenna.

Line of sight

Ground propagation

Sky propagation

Microwaves


Amplifiers are used to __________the signal to heat.

Amplify

Rectify

Testify

NUllify


There are ________ basic categories of multiplexing.

3

4

2

5


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If a T-1 carries 8000 frames, the data rate is ___________

2.544 Mbps

1.544 Mbps

1.544 Kbps

1.544 Gbps

Questi on No: 21 ( Marks: 1 ) - Please choose one

FTTC stands for _____________ flexible to the curb

fiber to the curb

fiber to the cable

fiber to the center


Optical signals are multiplexed using _________ at switching office to createwider BW optical signals

WDM

FDM

TDM

MUX




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Which error detection method consists of a parity bit for each unit as well as anentire data unit of parity bits?

Simple parity check

Two-dimensional parity check

CRC

Ch ecksum


If the ASCII character G is sent and the character D is received, what type oferror is this?

Single-bit

Multiple-bit

Burst

Recoverable


Flow control is needed to prevent ____________

Bit errors

Overflow of the sender buffer

Overflow of the receiver buffer

Collision between sender and receiver




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ENQ/ACK stands for______________

Enquiry/ Acknowledgment

Enque/ Acknowledgment

Enquist/ Acknowledgment

none of the given


In __________ ARQ, if a NAK is received, only the specific damaged or lostframe is retransmitted.

Stop-and-wait

Go-Back-N

Selective repeat

Stop-and-wait & Go-back-N


Sliding window requires that data frames be transmitted _______________

Sequentially

Frequently

Synchronously

Asynchronously




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Which of the following combines features of the other two.

ZMODEM

YMODEM

XMODEM

None of given


BLAST stands for :

Blocked asynchronous transmission

Blocked synchronous transmission

Barrel asynchronous transmission

Below asynchronous transmission


HDLC is an acronym for ______________.

High-duplex line communication

High-level data link control

Half-duplex digital link combination

Host double-level circuit




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The HDLC ___________ field defines the beginning and end of a frame.

Flag

Address

Control

FC S


The shortest frame in HDLC protocol is usually the _________ frame.

Information

Supervisory

Management

None of the given


The PDU has no flag fields, no CRC, and no station address

TRUE

FALSE


_________ is the access protocol used by traditional Ethernet.

CSMA/CD



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CSMA/CA

Token Ring

CSMA

Questio n No: 39 ( Marks: 1 ) - Please choose one

Repeater is an amplifier, not a regenerator.

True

False


Bridges can divide a large ________ into smaller segments

Network

Packet

Frame

Address


Stop-and- wait ARQ has two control variables S and R. What are their functions?[2]

Go-back-n ARQSelective Reject ARQ


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What's the name of the telephone service in which there is no need of dialing.


What is meant by Transmission Impairments?


How does the checksum checker know that the received data unit isundamaged? [3]


What is Geosynchronous satellite?

.Question No: 46 ( Marks: 3 )

Following abbreviations stands for?

1. ARP2. RARP3. ICMP


Name and discuss briefly the bits in the HDLC control field. [5]


Describe method of checksum briefly?



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What is satellite communication?


In how many ways TDM can be implemented? Describe any one with example.



31/50

3 A single bit is inverted per data unit2 A single bit is inverted per transmission1 A single bit is inverted

Which of the following best describes a single-bit error?


Total Marks: 60 Total

Questions: 12

**WARNING: Please note that Virtual University takes serious note of unfairmeans. Anyone found involved in cheating will get an `F` grade in this course.

b. On the other hand, if you believe that all of the choices provided for a particularquestion are the wrong ones, select the one that appears to you as being theleast wrong.

a. If you believe that two (or more) of the choices are the correct ones for aparticular question, choose the best one.

4. Examination also consists of multiple-choice questions. Choose only one choice asyour answer.


a. If you think that there is something wrong with any of the questions, attempt it tothe best of your understanding.


b. You will have to answer correctly all questions in this examination to get themaximum possible marks.

a. There is no choice.2. Answer all questions.1. This examination is closed book, closed notes, closed neighbors.

Please read the following instructions carefully before attempting any question:Instructions

Time Allow ed: 150 MinutesFinal Term Examination - February 2005




32/50

b. Selective Rejecta. Go-Back N

1) After transmitting several frames, the transmitter receives a NAK 'i' frame. Describe howthe transmitter reacts in the following error control protocols.

Briefly answer the following questions.


4 None of the above3 WDM2 FDM1 TDM

Which multiplexing technique involves signals composed of light beams?


4 Atmosphere3 Coaxial Cable

2 Fiber Optic Cable1 Twisted Pair

Which of the following is not a guided medium?


4 Fiber Optic Cable3 Twisted Pair2 Coaxial Cable1 Atmosphere

In an environment with many high-voltage devices, the best transmission mediumwould be _________.


4 Very Low Frequency3 Radio2 Light1 Infrared

In fiber optic cable, the signal source is__________ waves


4 Any of the above


33/50

1 Overflow of sender buffer

Flow Control is needed to prevent ____________


c. How does the receiver check whether the message T was transmitted without anyerrors?

b. What is the transmitted message T.

a. Given a message M = 1010001101, determine the CRC using the polynomial

P = x 5 + x4 + x2 + 1.

The following questions deal with CRC error detecting code.


4 Presentation3 Physical2 Application

1 Network

The _______ layer changes bits into electromagnetic signals.


2) Find the maximum data rate of a noiseless 4-kHz channel-using Analog encodinge.g. QPSK with 2 bits per sample?

1) A binary signal is sent over a 3 kHz. Channel. Signal's S/N ratio is 3162 (36dB).Calculate the maximum achievable data rate?

Solve the following. Show all the work to get full credit.


4 Network 3 Transport2 Application1 Presentation

Layer 2 lies between the physical layer and the _______ layer.


2) A communication protocol is an agreement required between two or more communicationentities and consists of three essential components. Name and describe briefly eachcomponent


34/50

Draw the digital signals for the bit string 0101 0100 1100 111 using NRZ-I and RZencoding schemes. A 0 is represented by a high value and a 1 is represented by a lowvalue.


4 Collision between sender and receiver 3 Bit Errors2 Overflow of the receiver buffer


35/50

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MID TERM EXAMINATION

SEMESTER Fall 2004

CS601- DATA COMMUNICATION

Total Marks:50

Duration:60min

StudentID/LoginID

Name

PVC Name/Code

Date

Maximum Time Allowed: (1 Hour)


1. The duration of this examination is 60 minutes.




a. If you think that there is something wrong w ith any of the questions, attempt it tothe best of your understanding.



For Teachers use only

Question Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 TotalMarks


What is the difference between active and passive hubs?


36/50


Which particular layer of OSI model is not required, if two devices communicate at the same network?Explain your answer with reason. Question No: 3 Marks:5

A sine wave is offset (amount of wave shift) 1/6 of a cycle with respect to time zero. What is its phase indegrees?


Which particular scheme is used in the following figure for digital to digital conversion? Explain youanswer with argument.


Which of the following determines the bandwidth required to send the signal?

1) Bit rate2) Baud rate

Explain with example.


A constellation diagram consists of eight equally spaced points on a circle. If bit rate is 4800 bps, what is the BaudRate?


How noise effect on ASK? What do you know about On-Off Keying (OOK) technique?


Differentiate between the terms Full Duplex and Half Duplex?

Value

1 0 0 1 1 1 0

Time


37/50


What do you know about DTE and DCE?


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MIDTERM EXAMINATION FALL 2006

CS601 - DATA COMMUNICATION

Marks: 55

Time: 60min

StudentID/LoginID: ______________________________

Student Name: ______________________________

Center Name/Code: ______________________________

Exam Date:





b. You w ill have to answer correctly all questions in this examination toget the maximum possible marks.

3. Do not ask any questions about the contents of this examination fromanyone.

a. If you think that there is something w rong with any of the questions,attempt it to the best of your understanding.

b. If you believe that some essential piece of information is missing, makean appropriate assumption and use it to solve the problem.

4. Choose only one choice as your answer in the multiple choice questions.

a. If you believe that two (or more) of the choices are the correct ones fora particular question, choose the best one.

b. On the other hand, if you believe that all of the choices provided for aparticular question are the wrong ones, select the one that appears toyou as being the least w rong.

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39/50

For Teacher's use onlyQuestion 1 2 3 4 5 6 7 8 Total

Marks


Briefly explain Transmission Tasks.( to the point and brief)


Explain briefly the mechanical and functional specifications of EIA 232.


Compare Digital Data Transmission methods and Bipolar encoding techniques.


A null modem is used between two DTE.

True

False


Serial transmission is more speedy then parallel transmission.

True

False


Transport layer is responsible for

entire message delivery

each packet delivery

End to end delivery


Which transmission method is less costly


40/50

serial

parallel

synchronous


DB25 and DB9 are the mechanical specifications of

RS232

EIA232

EIA 530


41/50

Calculate the Bit Rate of the Digital signal given below?


Find the Bandwidth for an FSK signal transmitting at 4000 b/s. Transmission is half-duplexand the carrier's separation band is 3000 Hz?


Total Marks: 50 TotalQuestions: 9

**WARNING: Please note that Virtual University takes serious notice of using unfairmeans. Anyone found involved in cheating will get `F` grade in this course.


a. If you think that there is something wrong with any of the questions, attempt it tothe best of your understanding.

4. Do not ask any questions about the contents of this examination from anyone.3. Answer all questions.2. This examination is closed book, closed notes, closed neighbors.1. The duration of this examination is 90 minutes.


Instructions

Time Allow ed: 90 Minutes

Mid Term Examination - November 2004




42/50

What is the sampling rate for PCM if the frequency ranges from 1000 to 4000 Hz?


A sine wave completes one cycle in 4 seconds. What is its frequency?


2 If the baud rate is 4000 bauds/second, what will be the Bit rate of the signal for thegiven baud rate?

1 What Modulation Technique does the Constellation represent?

Consider the Constellation Diagram given below:


0 1 0 0 1 1 0 1 1 1 00 0 0 1

Encode the given bit stream using Unipolar, NRZL and NRZI schemes of Encoding.


The bit rate of a signal is 3000. If each signal carries six bits, what is the Baud rate?


Time

condsnanose16


43/50

What do you know about Tree topology?


The frequency spectrum has a bandwidth of 500 MHz with the highest frequency componentat 600 MHz. What should be the minimum Sampling Rate according to the Nyquist Theorem?



44/50

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**WARNING: Please note that Virtual University takes serious note of unfairmeans. Anyone found involved in cheating will get an `F` grade in this course.

b. On the other hand, if you believe that all of the choicesprovided for a particular question are the wrong ones, selectthe one that appears to you as being the least wrong.

a. If you believe that two (or more) of the choices are the correctones for a particular question, choose the best one.

4. Choose only one choice as your answer in the multiple choicequestions.

b. If you believe that some essential piece of information ismissing, make an appropriate assumption and use it to solvethe problem.

a. If you think that there is something wrong with any of thequestions, attempt it to the best of your understanding.

3. Do not ask any questions about the contents of this examinationfrom anyone.

b. You w ill have to answ er correctly all questions in thisexamination to get the maximum possible marks.




Please read the following instructions carefully before attempting any

question:

Time Allow ed: 90 MinutesMid Term Examination Spring 2006

mailto:[email protected]:[email protected]:[email protected]:[email protected]


45/50

The information to be communicated in a data communication system is the___________.


Transport Network Data Link Physical

The __________ layer is the layer closest to the transmission medium.


b) Access Control.a) Physical Addressing.

Write details of the following functions of data link layer with respect to OSI model.


One of the disadvantages of using point to point (Mesh) network is that the number of connections grows more rapidly as the number of computers increase. Find the numberof connections needed to be used in point to point (Mesh) topology in network of 10 andthan 40 computers. Also find that how many I/O ports are needed for each device in bothcases. Also write formulas used to solve this question?


PSK FSK ASK QAM

Which of the following is most affected by voice ?


46/50

Bandwidth Phase Period Frequency

Amount of time a signal needs to complete one cycle is ____________


0 0 0 1 1 1 0 0 Encode the given bit stream using Manchester encoding scheme.


We want to digitize the human voice. What is the bit rate, assuming 8 bits per sample?Also write formulas used to solve this question.


None of these Both Asynchronous Synchronous

In ________________ transmission a timing of signal is unimportant.


Transmission Message Protocol Medium


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MIDTERM EXAMINATIONSpring 2009

CS601- Data Communication (Session - 1)

Question No: 1 ( Marks: 1 ) - Please choose o ne

InRS 422 Balanced mode two lines carry ________ signals which are not identical to each other. same different digital analog

Question No: 2 ( Marks: 1 ) - Please choose oneThe

__________ generates the data and passes it along with any control information to a___________.

DTE; DCE DCE; DTE

DCE; node DTE; application

Question No: 3 ( Marks: 1 ) - Please choose oneIn

_____________ transmission, a start bit and a stop bit frame a character byte. Asynchronous serial Synchronous serial Parallel Asynchronous & Synchronous serial


_____________ transmission, bits are transmitted simultaneously, each across its own wire. Asynchronous serial Synchronous serial Parallel Asynchronous & Synchronous serial


Asynchronous transmission is ___________ slow costly non-effective fast




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In

____________ transmission the timing of the signal is unimportant. Asynchronous

SynchronousPolar

Bi-polar


8QAM each signal shift or one baud represents ______. 4 bits 2 bits 5 bits 3 bits


PCM is the first process of PAM. True False

Question No: 9 ( Marks: 1 ) - Please choose oneBi

phase encoding is a type of bipolar encoding in which we use two voltage levels. True False


amplitude of a digital signal depends upon the________ to represent a bit. phase voltage wavelength


Time domain plot show changes in signal phase with respect to time. True False

Question No: 12 ( Marks: 1 ) - Please choose oneOSI

model was developed prior to TCP/IP model . True False



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_________ layer is the layer closest to the transmission medium.

physical data link network transport

Question No: 14 ( Marks: 1 ) - Please choose oneData

chunk at data link layer is called________framepacketdatagram

Question No: 15 ( Marks: 1 ) - Please choose one Theinternet model consists of _________ layers.

three two five seven


__________representation of links that connect nodes is called as physical topology.

geometrical logicalphysical


_______ is a multipoint topology. Ring Mesh Tree Bus


mesh topology, if there are five nodes then there will be _______ links. 5 10 15 20



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Nonproprietary standard is also termed as de facto standard.

True

False


Effective network mean that the network has fast delivery, timeliness and high bandwidth duplex transmission accurate transmission low bandwidth


What is purpose of distributed processing?


What is HDB3.


Differentiates between the following terms. [10 marks](a) Syntax and Semantics of protocol.(b) Network management and exchange management.(c) Monolithic and structured .


Differentiate between the following terms.

a) Frequency spectrum and bandwidth .

(b) Bandwidth and throughput .

(c) Bit interval and bit rate.
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cs601 collection of old papers

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