wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

DATA LINK LAYER CONTROL

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

In ______, the chance of collision can be reduced if a station senses the medium before trying to use it.

a)

CSMA

b)

MA

c)

CDMA

d)

FDMA

2.

The original ALOHA protocol is called

a)

simple ALOHA

b)

pure ALOHA

c)

CSMA

d)

FDMA

3.

__________ augments the CSMA algorithm to detect collision.

a)

CSMA/CD

b)

CSMA/CA

c)

either (a) or (b)

d)

both (a) and (b)

4.

In the _________ method, after the station finds the line idle, it sends its frame immediately. If the line is not idle, it continuously senses the line until it finds it idle.

a)

p-persistent

b)

nonpersistent

c)

1-persistent

d)

none of the above

5.

In ___________ methods, no station is superior to another station and none is assigned the control over another.

a)

controlled access

b)

random access

c)

channelization

d)

none of the above

6.

In the ________method, a station that has a frame to send senses the line. If the line is idle, it sends immediately. If the line is not idle, it waits a random amount of time and then senses the line again.

a)

controlled access

b)

nonpersistent

c)

p-persistent

d)

none of the above

7.

To avoid collisions on wireless networks, ________was invented.

a)

CSMA/CD

b)

CSMA/CA

c)

either (a) or (b)

d)

both (a) and (b)

8.

In __________, each station is forced to send only at the beginning of the time slot.

a)

pure ALOHA

b)

slotted ALOHA

c)

both (a) and (b)

d)

neither (a) nor (b)

9.

In ________ each station sends a frame whenever it has a frame to send.

a)

slotted ALOHA

b)

pure ALOHA

c)

both (a) and (b)

d)

neither (a) nor (b)

10.

Which of the following tasks is not done by data link layer?

a)

framing

b)

error control

c)

flow control

d)

channel coding

11.

Which of the following is the multiple access protocol for channel access control?

a)

CSMA/CD

b)

CSMA/CA

c)

Both CSMA/CD & CSMA/CA

d)

HDLC

12.

_______ control refers to a set of procedures used to restrict the amount of data that the sender can send before waiting for acknowledgment.

a)

Flow

b)

Error

c)

Transmission

d)

none of the above

13.

The Simplest Protocol and the Stop-and-Wait Protocol are for ______ channels.

a)

noiseless

b)

noisy

c)

either (a) or (b)

d)

neither (a) nor (b)

14.

In the _____ Protocol, the sender sends its frames one after another with no regard to the receiver.

a)

Simplest

b)

Selective-Repeat ARQ

c)

Stop-and-Wait

d)

Go-Back-N ARQ

15.

In the _____ Protocol, the sender sends one frame, stops until it receives confirmation from the receiver, and then sends the next frame.

a)

Simplest

b)

Stop-and-Wait

c)

Selective-Repeat ARQ

d)

Go-Back-N ARQ

16.

The Carrier Sense Multiple Access/Collision Detection (CSMA/CD) is used to avoid the

a)

errors

b)

multiple access

c)

point to point access

d)

collision

17.

------------tells the sender how much data to send

a)

Error Control

b)

Flow control

c)

Medium Access

d)

Multiple Access

18.

In CSMA/CD , CD means...........................

a)

Collision Detection

b)

Collision Deadock

c)

Collision Deterioration

d)

Collision Deletion

19.

CSMA/CD is an extension of ----------------------method

a)

CDMA

b)

CSMA

c)

CAMS

d)

CMAS

20.

In CSMA/CD after the occurrence of collision, station waits for some random ---------------- and then retransmits.

a)

back time

b)

backoff time

c)

back out time

d)

back in time