Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q2491: In ALOHA, if a collision occurs, what action does the station take?
- A: Stops communication completely
- B: Sends an error message
- C: Waits a random time and retransmits
- D: Changes the channel
View Answer
C
Q2492: Fill in the blank: In the ALOHA protocol, stations transmit data _______.
- A: at regular intervals
- B: at scheduled times
- C: whenever they have data to send
- D: after receiving permission
View Answer
C
Q2493: Which of the following describes the procedure of pure ALOHA?
- A: Send, wait for acknowledgment, resend on failure
- B: Listen, send only if idle
- C: Transmit immediately, retransmit after collision
- D: Listen, then transmit after delay
View Answer
C
Q2494: Fill in the blank: After transmitting a frame in ALOHA, the station waits for an _______.
- A: error
- B: log
- C: file acknowledgment
- D:
View Answer
B
Q2495: What happens if an acknowledgment is not received in ALOHA?
- A: The station deletes the frame
- B: The station waits forever
- C: The station retransmits after a random delay
- D: The station sends an error message
View Answer
C
Q2496: In the ALOHA procedure, the purpose of the random delay before retransmission is to _______.
- A: ensure faster delivery
- B: avoid repeated collisions
- C: increase throughput
- D: prevent message loss
View Answer
B
Q2497: What determines the waiting time after a collision in ALOHA?
- A: Fixed timer
- B: Random backoff timer
- C: Clock cycle
- D: Sequence number
View Answer
B
Q2498: Fill in the blank: If no collision is detected, the ALOHA frame is considered _______.
- A: corrupted
- B: skipped
- C: delivered successfully
- D: dropped
View Answer
C
Q2499: Which of the following is true about ALOHA's transmission strategy?
- A: It uses token passing
- B: It checks for idle lines first
- C: It transmits without checking channel status
- D: It uses polling
View Answer
C
Q2500: Fill in the blank: In the ALOHA procedure, every frame is sent as a _______.
- A: continuous stream
- B: high-priority packet
- C: standalone unit with acknowledgment
- D: ping message
View Answer
C