Data Link Layer Concepts: Master the Fundamentals of Data Transmission

Question 1

What is a key purpose of using a Cyclic Redundancy Check (CRC)?

Accepted Answer

To detect errors in data transmission

Answer

To correct errors in data transmission

Answer

To improve data transmission speed

Answer

To provide encryption for data transmission

Question 2

What is the primary function of Media Access Control (MAC)?

Accepted Answer

To regulate access to a shared transmission medium

Answer

To provide error correction for data transmission

Answer

To manage the flow of data between devices

Answer

To establish a secure connection between devices

Question 3

Which of the following is an example of a framing technique used in data communications?

Accepted Answer

Ethernet frames

Answer

IP packets

Answer

TCP segments

Answer

UDP datagrams

Question 4

Explain the fundamental difference between full-duplex and half-duplex transmission modes.

Accepted Answer

Full-duplex enables simultaneous transmission and reception, while half-duplex does not.

Answer

Half-duplex enables simultaneous transmission and reception, while full-duplex does not.

Answer

Full-duplex transmits data only, while half-duplex receives data only.

Answer

Half-duplex transmits data only, while full-duplex receives data only.

Question 5

Describe a key advantage of utilizing a hierarchical network model.

Accepted Answer

Facilitates network management and expansion.

Answer

Enhances security and reliability.

Answer

Reduces network implementation costs.

Answer

Improves network performance.

Question 6

Which of the following is NOT a primary function of the data link layer?

Accepted Answer

Network routing

Answer

Framing and Delimiting

Answer

Error control

Answer

Flow control

Question 7

What is the purpose of framing in data link layer transmission?

Accepted Answer

To delimitate the beginning and end of data packets

Answer

To add error-checking information to packets

Answer

To regulate the speed of data transmission

Answer

To encrypt data for secure transmission

Question 8

Which error control method involves retransmitting data until an acknowledgment is received?

Accepted Answer

Automatic Repeat Request (ARQ)

Answer

Parity checking

Answer

Cyclic redundancy check

Answer

Forward Error Correction (FEC)

Question 9

Which network topology has a central hub to connect all network devices?

Accepted Answer

Star Topology

Answer

Bus Topology

Answer

Ring Topology

Answer

Mesh Topology

Question 10

What is the primary purpose of flow control in the data link layer?

Accepted Answer

To prevent data loss due to network congestion

Answer

To ensure error-free data transmission

Answer

To assign MAC addresses to devices

Answer

To regulate the transmission speed of a network

Question 11

What is the primary function of a bridge in computer networking?

Accepted Answer

To connect two LAN segments that use the same protocol

Answer

To provide internet access to network devices

Answer

To protect a network from cyber threats by acting as a firewall

Answer

To store and forward data packets based on routing decisions

Question 12

Within the OSI model, how does the layered approach facilitate the implementation of the Data Link Layer?

Accepted Answer

It enables modular development and independent operation of each layer.

Answer

It simplifies the complexity of data transmission processes.

Answer

It guarantees compatibility among different network devices.

Question 13

Which is the key advantage of using Forward Error Correction (FEC) compared to other error control methods?

Accepted Answer

FEC can detect and correct errors without needing retransmissions.

Answer

FEC is more efficient in computation than other error control methods.

Answer

FEC can correct more errors than other methods.

Answer

FEC is always the best choice for error control in data networks.

Question 14

For a network with varying traffic patterns, which flow control method is most suitable: stop-and-wait or sliding window?

Accepted Answer

Sliding window protocol

Answer

Stop-and-wait protocol

Question 15

Which technique segments data into manageable units called frames for transmission?

Accepted Answer

Framing

Answer

Error detection

Answer

Flow control

Answer

Media access control

Question 16

Identify the protocol that is primarily responsible for detecting and correcting errors in data transmission:

Accepted Answer

Cyclic redundancy check (CRC)

Answer

Carrier sense multiple access with collision detection (CSMA/CD)

Answer

Transmission control protocol (TCP)

Answer

Internet protocol (IP)

Question 17

Which strategy prevents data from overwhelming the receiver in data transmission?

Accepted Answer

Flow control

Answer

Error detection

Answer

Media access control

Answer

Network address translation

Question 18

Which method is used to regulate access to a shared transmission channel?

Accepted Answer

Media access control

Answer

Frame relay

Answer

Asynchronous transfer mode (ATM)

Answer

Point-to-point protocol (PPP)

Question 19

Which type of error occurs when a data frame is received intact but contains incorrect information?

Accepted Answer

Checksum error

Answer

Bit error

Answer

Framing error

Answer

Synchronization error

Question 20

What is the primary function of a Media Access Control (MAC) address?

Accepted Answer

Identifying individual devices on a network

Answer

Routing data packets across networks

Answer

Transmitting data over physical media

Answer

Controlling the flow of data between devices

Question 21

Which data link layer protocol is commonly used in Ethernet networks?

Accepted Answer

Carrier sense multiple access with collision detection (CSMA/CD)

Answer

Token ring

Answer

Frame relay

Answer

Asynchronous transfer mode (ATM)

Question 22

How does the sliding window protocol contribute to reliable data transmission?

Accepted Answer

By acknowledging received frames and retransmitting lost ones

Answer

By encrypting data to prevent unauthorized access

Answer

By compressing data to reduce transmission time

Answer

By establishing multiple paths for data transmission

Question 23

Which error control technique utilizes a parity bit to detect errors?

Accepted Answer

Vertical redundancy check (VRC)

Answer

Longitudinal redundancy check (LRC)

Answer

Cyclic redundancy check (CRC)

Answer

Checksum

Question 24

What is the primary purpose of a preamble in a data frame?

Accepted Answer

Synchronizing the receiver and transmitter

Answer

Indicating the start of a new frame

Answer

Containing error detection information

Answer

Providing addressing information