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Posts Tagged ‘VU. CS601 – .DATA. COMMUNICATION. MIDTERM .EXAMINATION. FALL .2006’

VU CS601 – DATA COMMUNICATION MIDTERM EXAMINATION FALL 2006

.

MIDTERM EXAMINATION

FALL 2006

CS601 – DATA COMMUNICATION

Marks: 55

Time: 60min

StudentID/LoginID:

Student Name:

Center Name/Code:

______________________________

______________________________

______________________________

Exam Date:

Please read the following instructions carefully before attempting any question:

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

2. Answer all questions.

a. There is no choice.

b. You will have to answer correctly all questions in this examination to

get the maximum 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 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, make

an 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 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 wrong ones, select the one that appears to

you as being the least wrong.

**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 Teacher’s use only

Question

Marks

1 2 3 4 5 6 7 8 Total

Question No: 1

( Marks: 15 )

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

Question No: 2

( Marks: 10 )

Explain briefly the mechanical and functional specifications of EIA 232.

Question No: 3

( Marks: 20 )

Compare Digital Data Transmission methods and Bipolar encoding techniques.

Question No: 4

( Marks: 2 )

– Please choose one

A null modem is used between two DTE.

► True

► False

Question No: 5

( Marks: 2 )

– Please choose one

Serial transmission is more speedy then parallel transmission.

► True

► False

Question No: 6

( Marks: 2 )

– Please choose one

Transport layer is responsible for

► entire message delivery

► each packet delivery

► End to end delivery

Question No: 7

( Marks: 2 )

– Please choose one

Which transmission method is less costly

► serial

► parallel

► synchronous

Question No: 8

( Marks: 2 )

– Please choose one

DB25 and DB9 are the mechanical specifications of

► RS232

► EIA232

► EIA 530

:”Times� o� ��Mif”;color:black’>Question No: 11 ( Marks: 1 ) – Please choose one

 

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

► True

► False

Question No: 12 ( Marks: 1 ) – Please choose one

OSI

model was developed prior to TCP/IP model.

► True

► False

.

Question No: 13 ( Marks: 1 ) – Please choose one

The

_________ layer is the layer closest to the transmission medium.

► physical

► data link

► network

► transport

Question No: 14 ( Marks: 1 ) – Please choose one

Data

chunk at data link layer is called________

►frame

►packet

►datagram

Question No: 15 ( Marks: 1 ) – Please choose one

The

internet model consists of _________ layers.

► three

► two

► five

► seven

Question No: 16 ( Marks: 1 ) – Please choose one

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

geometrical

►logical

►physical

Question No: 17 ( Marks: 1 ) – Please choose one

_______ is a multipoint topology.

► Ring

► Mesh

► Tree

Bus

Question No: 18 ( Marks: 1 ) – Please choose one

In

mesh topology, if there are five nodes then there will be _______ links.

► 5

► 10

.

► 15

► 20

Question No: 19 ( Marks: 1 ) – Please choose one

Non

proprietary standard is also termed as de facto standard.

► True

► False

Question No: 20 ( Marks: 1 ) – Please choose one

Effective network mean that the network has fast delivery, timeliness and

► high bandwidth

► duplex transmission

► accurate transmission

► low bandwidth

Question No: 21 ( Marks: 2 )

What is purpose of distributed processing?

Question No: 22 ( Marks: 3 )

What is HDB3.

Question No: 23 ( Marks: 5 )

Differentiates between the following terms. [10 marks]

(a) Syntax and Semantics of protocol.

(b) Network management and exchange management.

(c) Monolithic and structured.

Question No: 24 ( Marks: 10 )

Differentiate between the following terms.

a) Frequency spectrum and bandwidth.

(b) Bandwidth and throughput.

(c) Bit interval and bit rate.

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parallel to each other

orthogonal (perpendicular) to each other.

intersect each other

equal to each other

Question No. 21

Marks : 04

What is meant by Trivial Accept?

Question No. 22

The Boundary Fill and Flood Fill algorithms:

Marks : 0

o

o

o

o

Must use 4-connected approach

Must use 8-connected approach

May use 4-connected or 8-connected approach

Must not use recursive approach

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