Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q2511: Which of the following best describes a key difference between Slotted and Pure ALOHA?
- A: Time slot alignment
- B: Random access delay
- C: Carrier sensing
- D: Time division multiplexing
View Answer
A
Q2512: Fill in the blank: In Slotted ALOHA, all stations are synchronized to start transmission _______.
- A: at a random time
- B: at different intervals
- C: at the start of the slot
- D: at the end of the slot
View Answer
C
Q2513: What is the benefit of reducing the vulnerable time to Tfr in Slotted ALOHA?
- A: Lower bandwidth
- B: Improved signal strength
- C: Increased throughput
- D: Lower energy consumption
View Answer
C
Q2514: In Slotted ALOHA, if two stations transmit in the same slot, what occurs?
- A: One frame succeeds
- B: Both frames are received
- C: Frames collide and are lost
- D: They merge into one frame
View Answer
C
Q2515: What is the maximum efficiency of Slotted ALOHA under ideal conditions?
- A: 0.184
- B: 0.368
- C: 0.5
- D: 1
View Answer
B
Q2516: Fill in the blank: Compared to Pure ALOHA, Slotted ALOHA _______ collision chances.
- A: increases
- B: reduces
- C: eliminates
- D: ignores
View Answer
B
Q2517: Which of the following is NOT a requirement of Slotted ALOHA?
- A: Synchronized clocks
- B: Time-slot allocation
- C: Carrier sensing
- D: Fixed transmission slots
View Answer
C
Q2518: What is a major limitation of Slotted ALOHA?
- A: High synchronization overhead
- B: Complex coding scheme
- C: Fixed bandwidth
- D: Multiple data channels
View Answer
A
Q2519: Fill in the blank: In Slotted ALOHA, collisions occur only when two stations transmit _______.
- A: simultaneously
- B: in consecutive slots
- C: in idle time
- D: after ACK
View Answer
A
Q2520: What feature allows Slotted ALOHA to outperform Pure ALOHA in terms of efficiency?
- A: Carrier sensing
- B: Time-slot alignment
- C: Random backoff
- D: Data encryption
View Answer
B