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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 1 2 3 4 5 6 7 8 Total

Marks

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