Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q2581: Fill in the blank: Acknowledgements in CSMA/CA help guarantee that the receiver has ______.
- A: Sent the frame
- B: Received the frame
- C: Encrypted the frame
- D: Buffered the data
View Answer
B
Q2582: Which mechanism confirms successful reception in CSMA/CA?
- A: Ping signal
- B: Encryption key
- C: Acknowledgement
- D: Parity check
View Answer
C
Q2583: What is the role of the time-out timer in CSMA/CA?
- A: To count data bits
- B: To delay transmission
- C: To control encryption
- D: To check if frame was received correctly
View Answer
D
Q2584: What is NAV in CSMA/CA?
- A: Network Authentication Value
- B: Network Access Vector
- C: Network Allocation Vector
- D: Network Acknowledgement Variable
View Answer
C
Q2585: In CSMA/CA, what is used to avoid immediate retransmission after collision?
- A: Contention Signal
- B: Contention Window
- C: Waiting Frame
- D: Acknowledgement
View Answer
B
Q2586: Which of the following is NOT a component of CSMA/CA?
- A: Interframe Space
- B: Contention Window
- C: Acknowledgement
- D: Data Compression
View Answer
D
Q2587: Fill in the blank: The ______ in CSMA/CA is a mechanism that indicates how long the channel will be busy.
- A: Contention Timer
- B: Interframe Sequence
- C: Network Allocation Vector
- D: Carrier Signal
View Answer
C
Q2588: The Network Allocation Vector (NAV) helps in ______.
- A: Reducing encryption
- B: Routing the packet
- C: Announcing channel usage
- D: Identifying user profiles
View Answer
C
Q2589: How does CSMA/CA reduce collisions?
- A: By sensing after transmission
- B: By increasing signal strength
- C: By deferring transmissions
- D: By using encryption
View Answer
C
Q2590: If a station fails to detect an idle channel, what happens to the Contention Window?
- A: It shrinks
- B: It doubles
- C: It remains the same
- D: It resets
View Answer
B