Data Link Layer: Protocols, Error Detection, and Correction

Question 1

Within the Data Link Layer, which protocol manages access to the transmission medium?

Accepted Answer

Ethernet

Answer

TCP

Answer

IP

Answer

HTTP

Question 2

Which error detection mechanism is primarily employed at the Data Link Layer?

Accepted Answer

CRC

Answer

Parity bit

Answer

Hamming code

Answer

Checksum

Question 3

What is the primary function of an Ethernet frame header?

Accepted Answer

Provide addressing information

Answer

Encapsulate the data payload

Answer

Detect errors

Answer

Control data flow

Question 4

Which of the following is NOT a responsibility of the Data Link Layer?

Accepted Answer

Establishing and terminating connections

Answer

Ensuring reliable data transmission

Answer

Handling error detection and correction

Answer

Encapsulating data into frames

Question 5

What is a key advantage of using CRC for error detection?

Accepted Answer

Detects all single-bit errors

Answer

Detects all double-bit errors

Answer

Detects all burst errors

Answer

Detects all parity errors

Question 6

What is the maximum size of the payload that can be carried in an Ethernet frame?

Accepted Answer

1500 bytes

Answer

1024 bytes

Answer

2048 bytes

Answer

4096 bytes

Question 7

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

Accepted Answer

To uniquely identify a device on a network

Answer

To determine the path of data transmission

Answer

To detect errors in data transmission

Answer

To control the flow of data

Question 8

Which of the following is the primary function of the Data Link Layer?

Accepted Answer

Detecting and correcting transmission errors

Answer

Establishing network connections

Answer

Transmitting data across the network

Answer

Providing routing and forwarding services

Question 9

What is the main purpose of a Cyclic Redundancy Check (CRC)?

Accepted Answer

To detect errors in data transmission

Answer

To correct transmission errors

Answer

To assign unique addresses to network devices

Answer

To regulate data flow on the network

Question 10

Which error correction technique involves the retransmission of corrupted data frames?

Accepted Answer

Automatic Repeat Request (ARQ)

Answer

Forward Error Correction (FEC)

Answer

Parity Checking

Answer

Checksum

Question 11

What is the primary role of MAC addresses in the Data Link Layer?

Accepted Answer

To uniquely identify network devices

Answer

To determine the network topology

Answer

To route data between different network segments

Answer

To assign IP addresses to network nodes

Question 12

Which of the following protocols operates at the Data Link Layer?

Accepted Answer

Ethernet

Answer

TCP

Answer

IP

Answer

HTTP

Question 13

What is the main function of a frame in the Data Link Layer?

Accepted Answer

To encapsulate data into a single unit for transmission

Answer

To provide routing information for data packets

Answer

To manage network congestion

Answer

To translate data into different protocols

Question 14

Which type of error detection mechanism uses a redundant bit to indicate if a data frame has been corrupted?

Accepted Answer

Parity Checking

Answer

Checksum

Answer

CRC

Answer

Hamming Code

Question 15

What is the purpose of an acknowledgement frame in the Data Link Layer?

Accepted Answer

To confirm the successful receipt of data frames

Answer

To request retransmission of corrupted data frames

Answer

To terminate a network connection

Answer

To assign IP addresses to network devices

Question 16

What is the key difference between data link switching and circuit switching in the Data Link Layer?

Accepted Answer

Data link switching creates temporary connections, while circuit switching creates permanent connections

Answer

Circuit switching creates temporary connections, while data link switching creates permanent connections

Answer

Data link switching is faster than circuit switching

Answer

Circuit switching is more reliable than data link switching

Question 17

Describe the primary function of the Data Link Layer in relation to the Network Layer.

Accepted Answer

Encapsulates Network Layer data into frames

Answer

Performs routing based on destination IP addresses

Answer

Provides physical layer connectivity

Question 18

Which protocol is used to ensure reliable data delivery over a link?

Accepted Answer

TCP

Answer

Ethernet

Answer

UDP

Answer

IP

Question 19

What is the primary purpose of a Cyclic Redundancy Check (CRC)?

Accepted Answer

Error detection

Answer

Error correction

Answer

Data encryption

Answer

Data compression

Question 20

Which error correction technique involves resending lost or corrupted data packets?

Accepted Answer

Automatic Repeat Request (ARQ)

Answer

Forward Error Correction (FEC)

Answer

Hamming Code

Answer

Checksum

Question 21

What is the main responsibility of the Data Link Layer in a network?

Accepted Answer

Reliable data transmission

Answer

Establishing connections

Answer

Routing data

Answer

Connecting hosts to networks

Question 22

Which network topology has a central device connecting all other devices?

Accepted Answer

Star

Answer

Bus

Answer

Ring

Answer

Mesh

Question 23

Which medium access control (MAC) protocol is widely used in wireless networks?

Accepted Answer

Wi-Fi

Answer

Ethernet

Answer

Bluetooth

Answer

Token Ring

Question 24

What is the primary function of a bridge in a network?

Accepted Answer

Connecting multiple LANs

Answer

Routing data between networks

Answer

Providing remote network access

Answer

Translating different network protocols

Question 25

What is the primary role of a switch in a network?

Accepted Answer

Forwarding data frames to specific destinations

Answer

Amplifying and regenerating signals

Answer

Providing a shared transmission medium

Answer

Translating between different network protocols

Question 26

Which Data Link Layer protocol is responsible for establishing and maintaining communication between devices?

Accepted Answer

ARP

Answer

HTTP

Answer

TCP

Answer

FTP

Question 27

What is the primary purpose of using Cyclic Redundancy Check (CRC) in data transmission?

Accepted Answer

To detect errors in transmitted data

Answer

To correct errors in received data

Answer

To reduce data transmission time

Answer

To increase data throughput

Question 28

Which error correction technique involves adding redundant information to allow for the reconstruction of lost or corrupted data?

Accepted Answer

Forward Error Correction (FEC)

Answer

Automatic Repeat Request (ARQ)

Answer

Parity checking

Answer

Checksumming

Question 29

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

Accepted Answer

To uniquely identify a device on a network

Answer

To route data packets across the internet

Answer

To control access to shared network resources

Answer

To provide encryption for data transmission

Question 30

Which network topology provides the most resilience to node failures?

Accepted Answer

Mesh topology

Answer

Bus topology

Answer

Ring topology

Answer

Star topology

Question 31

What is the purpose of a collision domain?

Accepted Answer

To define the area where network collisions can occur

Answer

To isolate network traffic from other parts of the network

Answer

To improve data transmission speed

Answer

To provide fault tolerance in case of network failures

Question 32

Which of the following is NOT a characteristic of Carrier Sense Multiple Access with Collision Detection (CSMA/CD)?

Accepted Answer

Multiple devices can transmit simultaneously without collisions

Answer

Nodes monitor the network before transmitting

Answer

Transmissions are halted when a collision is detected

Answer

Nodes wait a randomized amount of time before retransmitting

Question 33

What is the primary function of a bridge in a network?

Accepted Answer

To connect multiple network segments

Answer

To route data packets based on IP addresses

Answer

To provide firewall protection

Answer

To translate network protocols

Question 34

At the Data Link Layer, which protocol is predominantly utilized?

Accepted Answer

Ethernet

Answer

TCP

Answer

UDP

Answer

IP

Question 35

What is the primary purpose of employing a Cyclic Redundancy Check (CRC)?

Accepted Answer

Detecting transmission errors

Answer

Correcting transmission errors

Answer

Encrypting transmitted data

Answer

Compressing transmitted data

Question 36

Within the Data Link Layer, which technique is commonly used for error correction?

Accepted Answer

Hamming code

Answer

Parity bit checking

Answer

Flow control

Answer

Checksum

Question 37

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

Accepted Answer

Identifying individual devices on a network

Answer

Providing the IP address of a device

Answer

Managing network traffic flow

Answer

Encrypting transmitted data

Question 38

Which of the following is not a type of error that can occur during data transmission?

Accepted Answer

Logic error

Answer

Bit error

Answer

Frame error

Answer

Parity error

Question 39

What is the primary reason for using a sliding window in data transmission?

Accepted Answer

Enhancing efficiency by sending multiple frames simultaneously

Answer

Detecting errors in transmission

Answer

Correcting errors in transmission

Answer

Reducing network congestion

Question 40

What is the fundamental difference between half-duplex and full-duplex transmission modes?

Accepted Answer

Simultaneous transmission and reception in full-duplex, not in half-duplex

Answer

Simultaneous transmission and reception in half-duplex, not in full-duplex

Answer

CSMA/CD used in half-duplex, not in full-duplex

Answer

CSMA/CD used in full-duplex, not in half-duplex

Question 41

Which network device operates at Layer 2?

Accepted Answer

Switch

Answer

Firewall

Answer

Router

Answer

Modem

Question 42

What is the primary objective of utilizing a spanning tree protocol in a network?

Accepted Answer

Preventing network loops

Answer

Optimizing network performance

Answer

Securing the network

Answer

Managing network traffic

Question 43

Which protocol operates at the Data Link Layer and is responsible for transmitting data over a physical link?

Accepted Answer

Ethernet

Answer

TCP

Answer

UDP

Answer

ARP

Question 44

What is the primary function of Cyclic Redundancy Check (CRC) in data transmission?

Accepted Answer

Detecting errors introduced during transmission

Answer

Correcting errors introduced during transmission

Answer

Compressing data to reduce transmission time

Answer

Encrypting data to protect its privacy

Question 45

Which error correction technique involves retransmitting lost or corrupted data frames?

Accepted Answer

Automatic Repeat Request (ARQ)

Answer

Forward Error Correction (FEC)

Answer

Parity checking

Answer

Hamming code

Question 46

Which type of frame encapsulates data specifically for transmission over Ethernet networks?

Accepted Answer

Ethernet frame

Answer

IP frame

Answer

ARP frame

Answer

TCP frame

Question 47

What is the purpose of Address Resolution Protocol (ARP) in networking?

Accepted Answer

Mapping IP addresses to MAC addresses

Answer

Mapping MAC addresses to IP addresses

Answer

Providing error control for data transmission

Answer

Establishing network connections

Question 48

Which technique is used to reduce collisions in Ethernet networks?

Accepted Answer

Carrier Sense Multiple Access with Collision Detection (CSMA/CD)

Answer

Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)

Answer

Token passing

Answer

ALOHA

Question 49

What is the maximum size of a data frame allowed in an Ethernet frame?

Accepted Answer

1500 bytes

Answer

512 bytes

Answer

1024 bytes

Answer

2048 bytes

Question 50

What is the role of the Media Access Control (MAC) address in data transmission?

Accepted Answer

Identifying the physical device sending or receiving data

Answer

Providing routing information for network packets

Answer

Checking for errors in data transmission

Answer

Controlling access to the network medium