Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 172
Q2541:
In CSMA/CD, what does a station do after sending a frame?
A. Wait for an acknowledgment
B. Shut down temporarily
C. Monitor the medium for collision
D. Log out of the network
Correct Answer:
C
Chapter: 172
Q2542:
Fill in the blank: If a collision is detected in CSMA/CD, the station ______ the frame.
A. deletes
B. forwards
C. ignores
D. retransmits
Correct Answer:
D
Chapter: 172
Q2543:
What action is taken after a collision is detected in CSMA/CD?
A. The station continues transmitting
B. The station sends a jamming signal and retries later
C. The station waits for user input
D. The system reboots
Correct Answer:
B
Chapter: 172
Q2544:
In the CSMA/CD protocol, how is a collision detected?
A. By monitoring energy levels on the medium
B. By analyzing the destination address
C. By checking data size
D. Through a time stamp
Correct Answer:
A
Chapter: 172
Q2545:
Which diagram best represents CSMA/CD working logic?
A. Network topology diagram
B. Flow chart or flow diagram
C. Bar chart
D. Truth table
Correct Answer:
B
Chapter: 172
Q2546:
Fill in the blank: CSMA/CD was mainly used in ______ networks.
A. wireless
B. old Ethernet
C. Wi-Fi
D. fiber optic
Correct Answer:
B
Chapter: 172
Q2547:
What is the purpose of sending a jamming signal in CSMA/CD?
A. To inform the receiver of successful delivery
B. To increase the speed of transmission
C. To ensure all stations are aware of the collision
D. To reset the network
Correct Answer:
C
Chapter: 172
Q2548:
When using CSMA/CD, if no collision is detected, what does the station assume?
A. Frame delivery failed
B. Transmission was successful
C. Collision occurred silently
D. It must retransmit
Correct Answer:
B
Chapter: 172
Q2549:
In CSMA/CD, what does a station monitor for collision detection?
A. Buffer queue
B. Signal amplitude
C. Energy level on the medium
D. Timestamp of packet
Correct Answer:
C
Chapter: 172
Q2550:
Which of the following best describes the behavior of CSMA/CD after detecting a collision?
A. Immediate resend
B. Backoff and retry
C. Random delay and retry
D. Stop transmitting
Correct Answer:
C
Chapter: 172
Q2551:
Fill in the blank: CSMA/CD reduces the chance of collision but does not ______ them.
A. handle
B. ignore
C. prevent
D. limit
Correct Answer:
C
Chapter: 172
Q2552:
What happens when multiple stations transmit at the same time in CSMA/CD?
A. No data is sent
B. Data is encrypted
C. Signals collide and become garbled
D. A signal is prioritized
Correct Answer:
C
Chapter: 172
Q2553:
Which condition is checked first in CSMA/CD before sending data?
A. Station priority
B. Energy level on channel
C. Idle medium
D. Frame size
Correct Answer:
C
Chapter: 172
Q2554:
Which of these protocols is based on CSMA/CD?
A. Ethernet
B. Wi-Fi
C. TCP
D. ARP
Correct Answer:
A
Chapter: 172
Q2555:
Fill in the blank: A collision is detected in CSMA/CD by comparing ______ sent and ______ received.
A. bits, signals
B. signals, packets
C. frames, signals
D. signals, signals
Correct Answer:
D
Chapter: 172
Q2556:
What must a station do after sending a jamming signal in CSMA/CD?
A. Stop and wait for next slot
B. Retry immediately
C. Leave the network
D. Turn off transmitter
Correct Answer:
A
Chapter: 173
Q2557:
What does CSMA/CA stand for?
A. Carrier Signal Management Architecture with Collision Avoidance
B. Carrier Sense Multiple Access with Collision Avoidance
C. Central Signal Medium Access for Control Algorithm
D. Collision Sensing Mechanism with Access
Correct Answer:
B
Chapter: 173
Q2558:
CSMA/CA was primarily designed for which type of network?
A. Ethernet
B. Fiber optics
C. Wired networks
D. Wireless networks
Correct Answer:
D
Chapter: 173
Q2559:
What is the main goal of CSMA/CA?
A. Increase collision rate
B. Detect collisions
C. Avoid collisions
D. Improve encryption
Correct Answer:
C
Chapter: 173
Q2560:
Which of the following is NOT one of the three strategies used in CSMA/CA?
A. Interframe Space
B. Contention Window
C. Carrier Decoding
D. Acknowledgements
Correct Answer:
C