Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 171
Q2521:
What is the primary goal of CSMA?
A. To increase bandwidth
B. To avoid retransmissions
C. To minimize collisions and improve performance
D. To reduce power consumption
Correct Answer:
C
Chapter: 171
Q2522:
What does CSMA require a station to do before sending data?
A. Check destination address
B. Send a broadcast message
C. Sense the medium
D. Encrypt the data
Correct Answer:
C
Chapter: 171
Q2523:
Fill in the blank: CSMA follows the principle of '______ before transmit'.
A. speak
B. move
C. listen
D. go
Correct Answer:
C
Chapter: 171
Q2524:
How does CSMA detect whether the medium is busy or idle?
A. By polling the receiver
B. Using a timer
C. By sensing the medium
D. Through IP checks
Correct Answer:
C
Chapter: 171
Q2525:
In the CSMA protocol, if the medium is busy, what action does a station take?
A. Wait until idle
B. Force transmit anyway
C. Change its address
D. Disconnect from the network
Correct Answer:
A
Chapter: 171
Q2526:
What is the vulnerable time in CSMA dependent on?
A. Frame size
B. Transmission delay
C. Propagation delay
D. Encryption time
Correct Answer:
C
Chapter: 171
Q2527:
Fill in the blank: CSMA is based on a simple idea— ______ the medium before transmission.
A. encrypting
B. checking
C. ignoring
D. sensing
Correct Answer:
D
Chapter: 171
Q2528:
Which of the following is a behavior model in CSMA?
A. Three persistence
B. Binary backoff
C. Exponential scan
D. Slotted randomization
Correct Answer:
A
Chapter: 171
Q2529:
In CSMA, which persistence strategy sends data immediately if the medium is idle?
A. 1-persistent
B. Non-persistent
C. p-persistent
D. Backoff
Correct Answer:
A
Chapter: 171
Q2530:
What does a non-persistent CSMA station do when it finds the medium busy?
A. Wait a random time before trying again
B. Keep sensing continuously
C. Send anyway immediately
D. Abort transmission
Correct Answer:
A
Chapter: 171
Q2531:
Fill in the blank: In p-persistent CSMA, stations transmit with a ______ probability.
A. zero
B. one
C. half
D. given
Correct Answer:
D
Chapter: 171
Q2532:
Which persistence method offers a compromise between efficiency and collision?
A. 1-persistent
B. non-persistent
C. p-persistent
D. aggressive mode
Correct Answer:
C
Chapter: 171
Q2533:
What is a major advantage of non-persistent CSMA?
A. High speed
B. Low complexity
C. Low chance of collision
D. Faster response
Correct Answer:
C
Chapter: 171
Q2534:
Which CSMA strategy increases the chance of collision the most?
A. non-persistent
B. p-persistent
C. 1-persistent
D. random access
Correct Answer:
C
Chapter: 171
Q2535:
What is the key difference between CSMA and ALOHA?
A. ALOHA requires polling
B. CSMA senses the medium before transmission
C. ALOHA is collision-free
D. CSMA uses encryption
Correct Answer:
B
Chapter: 171
Q2536:
Fill in the blank: CSMA reduces collisions by requiring stations to check if the ______ is free.
A. buffer
B. link
C. queue
D. medium
Correct Answer:
D
Chapter: 171
Q2537:
Which of the following terms is associated with CSMA?
A. Synchronous transmission
B. Listen Before Talk
C. Dual encoding
D. Packet fragmentation
Correct Answer:
B
Chapter: 171
Q2538:
What does the 'carrier' in CSMA stand for?
A. Data frame
B. Medium
C. Signal carrier
D. Channel
Correct Answer:
C
Chapter: 172
Q2539:
What does CSMA/CD stand for?
A. Carrier Signal Monitoring Algorithm for Collision Detection
B. Carrier Sense Multiple Access with Collision Detection
C. Collision Sense Method Access
D. Carrier Selection and Medium Arbitration
Correct Answer:
B
Chapter: 172
Q2540:
What major feature does CSMA/CD add to CSMA?
A. Collision prevention
B. Encryption
C. Collision handling and retransmission
D. Centralized control
Correct Answer:
C