Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q2501: What is the goal of the random delay in the ALOHA retransmission step?
- A: Reduce congestion
- B: Increase energy efficiency
- C: Enhance synchronization
- D: Speed up the process
View Answer
A
Q2502: What type of acknowledgment does ALOHA depend on?
- A: Synchronous
- B: Asynchronous
- C: Explicit Implicit
- D:
View Answer
C
Q2503: Which of the following is NOT a step in the pure ALOHA procedure?
- A: Send data
- B: Wait for acknowledgment
- C: Check if channel is idle
- D: Resend if collision
View Answer
C
Q2504: Fill in the blank: The efficiency of pure ALOHA decreases when the _______ increases.
- A: number of stations
- B: number of channels
- C: delay in acknowledgment
- D: amount of memory used
View Answer
A
Q2505: What is the main purpose of dividing time into slots in Slotted ALOHA?
- A: To avoid retransmissions
- B: To eliminate data collisions
- C: To increase efficiency over pure ALOHA
- D: To reduce signal strength
View Answer
C
Q2506: In Slotted ALOHA, when is a station allowed to send data?
- A: Anytime it has data to send
- B: Only after receiving permission
- C: At the beginning of a time slot
- D: After detecting a collision
View Answer
C
Q2507: Fill in the blank: Slotted ALOHA was invented to improve the efficiency of _______.
- A: CSMA
- B: pure ALOHA
- C: TDMA
- D: FDMA
View Answer
B
Q2508: What happens if a station misses its designated time slot in Slotted ALOHA?
- A: It sends immediately
- B: It aborts transmission
- C: It waits for the next available slot
- D: It switches protocol
View Answer
C
Q2509: Fill in the blank: The vulnerable time in Slotted ALOHA is reduced to _______.
- A: 2 x Tfr
- B: 1 x Tfr
- C: 0.5 x Tfr
- D: 4 x Tfr
View Answer
B
Q2510: What does "Tfr" represent in Slotted ALOHA?
- A: Time frame
- B: Transmission frame
- C: Transfer rate
- D: Timeout frame
View Answer
B