ECGR$-3123$ Data Communications and Networking

Exam $-$I

NAME

STUDENT No$.$

Note:

This is a closed book and notes exam. Calculators are allowed.

ANSWER ALL QUESTIONS IN THE SPACE PROVIDED. Use the backside if needed.

The points for each question are indicated. Total points$=100.$

Include sufficient detail to earn partial credit.

Time: $10$:$00$ AM to $11$:$45$ AM $+15$ minutes for online submission.

Section I: p$)$

Exercise $1$: Provide only the right answer for each of the following statements: $(18$p$)$

A data communication model involves

elements and

systems.

A$)2,2$

B$)3,2$

C$)4,3$

D$)5,3$

E$)$ None of these

Telephone communication is an example of$.$

transmission.

$($A$)$ Full Duplex

$($B$)$ Simplex

$($C$)$ Automatic

$($D$)$ Half Duplex

$($E$)$ None of these

Computers connected to a local area network $($LAN$)$ cannot share information.

$($A$)$ True

$($B$)$ False

Key communication tasks include :

A$)$ Security

B$)$ Routing

C$)$ Exchange Management

D$)$ Recovery

E$)$ All of these