Media Access Control Protocols: A Comprehensive Guide for Data Communications

Question 1

Which characteristic is NOT associated with CSMA/CD?

Accepted Answer

Slotted access

Answer

Carrier sensing

Answer

Collision detection

Answer

Listen before transmitting data

Question 2

In a token passing protocol, which device holds the token and is permitted to transmit data?

Accepted Answer

The station that received the token

Answer

The station that created the token

Answer

Any station that requests the token

Answer

The station with the highest priority

Question 3

What is the function of the preamble in an Ethernet frame?

Accepted Answer

Synchronizing transmitting and receiving devices

Answer

Identifying the destination MAC address

Answer

Indicating the start of a new frame

Answer

Determining the length of the frame's payload

Question 4

What is the purpose of the destination MAC address in an Ethernet frame?

Accepted Answer

To identify the device that is intended to receive the frame

Answer

To identify the device that sent the frame

Answer

To determine the priority of the frame

Answer

To verify the integrity of the frame

Question 5

What is the minimum allowable frame size in an Ethernet network?

Accepted Answer

64 bytes

Answer

32 bytes

Answer

128 bytes

Answer

256 bytes

Question 6

Which MAC protocol ensures that data packets are transmitted without delay, making it ideal for applications where timely delivery is crucial?

Accepted Answer

Token passing

Answer

CSMA/CD

Answer

CSMA/CA

Answer

Ethernet

Question 7

Which characteristic is unique to CSMA/CD?

Accepted Answer

Collision detection mechanism

Answer

Exclusive use in Ethernet networks

Answer

Token-based access control

Answer

Operation solely in half-duplex mode

Question 8

How does CSMA/CA differ from CSMA/CD in its operation?

Accepted Answer

It utilizes a carrier sense mechanism.

Answer

It operates in full-duplex mode.

Answer

It allows multiple collisions on the network.

Answer

It is exclusively used in wired networks.

Question 9

What is the primary advantage of using a token passing protocol?

Accepted Answer

Ensuring collision-free access to the network

Answer

Improving overall network performance

Answer

Reducing the need for error detection mechanisms

Answer

Simplifying network management and configuration

Question 10

In the OSI model, which layer is responsible for managing MAC protocols?

Accepted Answer

Data link layer

Answer

Physical layer

Answer

Network layer

Answer

Transport layer

Question 11

What is the primary purpose of a MAC address on a network interface?

Accepted Answer

To uniquely identify the interface on the network

Answer

To direct packets across the network

Answer

To control access to shared transmission media

Answer

To encrypt data before transmission over the network

Question 12

What is the significance of the preamble in an Ethernet frame?

Accepted Answer

It marks the start of the frame and synchronizes the receiver's clock

Answer

It contains the destination MAC address of the frame

Answer

It protects the data within the frame from errors

Answer

It provides routing information for the frame

Question 13

Which of the following is a defining characteristic of CSMA/CD?

Accepted Answer

Nodes detect collisions and defer data transmission for a random interval before retrying

Answer

Nodes transmit data concurrently without pausing to check for a clear channel

Answer

Nodes rely on a central authority to manage transmission permission

Answer

Nodes employ a token passing mechanism to regulate access to the medium

Question 14

In a CSMA/CA network, what is the consequence of simultaneous data transmission by multiple nodes?

Accepted Answer

Nodes detect the collision and implement a randomized back-off period before retransmitting

Answer

Data loss occurs, necessitating retransmission

Answer

Nodes persist in transmitting data until one transmission succeeds

Answer

A central authority arbitrates to resolve the collision

Question 15

Which MAC protocol is primarily associated with Ethernet networks?

Accepted Answer

CSMA/CD

Answer

Token passing

Answer

CSMA/CA

Answer

ALOHA

Question 16

What is the primary function of a token in a token passing network?

Accepted Answer

To indicate which node is authorized to transmit data

Answer

To prevent data collisions during transmission

Answer

To regulate the data transmission rate

Answer

To identify the source of data packets

Question 17

What is the key distinction between CSMA/CD and CSMA/CA?

Accepted Answer

CSMA/CD detects collisions whereas CSMA/CA prevents them

Answer

CSMA/CA is employed in wired networks while CSMA/CD is used in wireless networks

Answer

CSMA/CD utilizes a token whereas CSMA/CA does not

Answer

There is no fundamental difference between CSMA/CD and CSMA/CA

Question 18

Which MAC protocol employs a token to control access to the network, ensuring that only one station transmits at a time?

Accepted Answer

Token Passing

Answer

CSMA/CD

Answer

FDDI

Answer

Ethernet

Question 19

Which MAC protocol is utilized in Ethernet networks and implements CSMA/CD?

Accepted Answer

Ethernet

Answer

ARCNET

Answer

Token Ring

Answer

FDDI

Question 20

Which MAC protocol is suitable for wireless networks and employs CSMA/CA to avert collisions?

Accepted Answer

CSMA/CA

Answer

Token Passing

Answer

Ethernet

Answer

CSMA/CD

Question 21

What is the purpose of the preamble in an Ethernet frame?

Accepted Answer

To synchronize the receiver's clock with the transmitter's clock

Answer

To identify the destination MAC address

Answer

To indicate the frame length

Question 22

Which field in the Ethernet frame identifies the destination device's MAC address?

Accepted Answer

Destination MAC Address

Answer

Source MAC Address

Answer

Data

Answer

Type

Question 23

What is the maximum payload size an Ethernet frame can carry?

Accepted Answer

1518 bytes

Answer

2048 bytes

Answer

1024 bytes

Answer

4096 bytes

Question 24

Within the OSI model, which layer oversees MAC protocols?

Accepted Answer

Data Link Layer

Answer

Physical Layer

Answer

Transport Layer

Answer

Network Layer

Question 25

On an Ethernet network, which MAC address is designated for broadcast transmissions?

Accepted Answer

FF:FF:FF:FF:FF:FF

Answer

12:34:56:78:90:AB

Answer

00:00:00:00:00:00

Answer

EF:CD:AB:89:67:45