Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q2571: Why is collision detection not practical in wireless networks?
- A: Signals are always encrypted
- B: The channel is always idle
- C: Collision detection consumes bandwidth
- D: Signal collision cannot be sensed while transmitting
View Answer
D
Q2572: How does CSMA/CA handle collisions differently from CSMA/CD?
- A: By increasing frame size
- B: By retrying multiple times
- C: By avoiding collisions rather than detecting them
- D: By changing frequency range
View Answer
C
Q2573: What occurs immediately after a station senses the channel is idle in CSMA/CA?
- A: It transmits immediately
- B: It checks for errors
- C: It waits for an Interframe Space
- D: It sends acknowledgment
View Answer
C
Q2574: What is the purpose of CSMA/CA?
- A: Avoid collisions
- B: Detect errors
- C: Enhance encryption
- D: Enable multicast
View Answer
A
Q2575: CSMA/CA was designed primarily for which type of network?
- A: Wired networks
- B: Fiber optic networks
- C: Wireless networks
- D: Peer-to-peer networks
View Answer
C
Q2576: What does IFS stand for in CSMA/CA?
- A: Initial Frame Sender
- B: Idle Frame Status
- C: Interframe Space
- D: Integrated Frame Service
View Answer
C
Q2577: In CSMA/CA, what does a station do if the channel is idle?
- A: Sends immediately
- B: Defers transmission for Interframe Space
- C: Terminates transmission
- D: Waits for acknowledgment
View Answer
B
Q2578: Fill in the blank: In CSMA/CA, a station selects a random number of ______ before transmission.
- A: Frames
- B: Channels
- C: Slots
- D: Signals
View Answer
C
Q2579: The Contention Window in CSMA/CA is divided into what?
- A: Time slices
- B: Data blocks
- C: Access codes
- D: Slots
View Answer
D
Q2580: What happens to the size of the Contention Window if a channel remains busy?
- A: It resets
- B: It doubles
- C: It halves
- D: It stops increasing
View Answer
B