Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 175
Q2601:
In polling, what is the role of the primary station?
A. Encrypt data
B. Control link
C. Store backup
D. Monitor power usage
Correct Answer:
B
Chapter: 175
Q2602:
Which device initiates communication in the polling method?
A. Secondary station
B. Client device
C. Primary station
D. Control node
Correct Answer:
C
Chapter: 175
Q2603:
In polling, all communication must go through the ______ device.
A. Backup
B. Secondary
C. Primary
D. Control
Correct Answer:
C
Chapter: 175
Q2604:
What is the main control responsibility of the primary station in polling?
A. Monitoring collisions
B. Controlling link
C. Sending encryption keys
D. Executing backups
Correct Answer:
B
Chapter: 175
Q2605:
Fill in the blank: The ______ device gives permission for others to send in polling.
A. Primary
B. Backup
C. Slave
D. Bridge
Correct Answer:
A
Chapter: 175
Q2606:
Which function does the primary station perform in polling?
A. Select and Poll
B. Encrypt and Store
C. Send and Request
D. Acknowledge and Forward
Correct Answer:
A
Chapter: 175
Q2607:
Fill in the blank: In token passing, a station must wait for a ______ to transmit data.
A. Key
B. Poll
C. Token
D. Permission
Correct Answer:
C
Chapter: 175
Q2608:
Which of the following ensures only one station transmits at a time in token passing?
A. Token
B. Encryption
C. Primary Station
D. Acknowledgement
Correct Answer:
A
Chapter: 175
Q2609:
In token passing, how is data transmission permission granted?
A. Using a schedule
B. Using a token
C. Using reservation
D. Using encryption key
Correct Answer:
B
Chapter: 175
Q2610:
What happens if a station does not have the token in token passing?
A. It transmits immediately
B. It stores the frame
C. It must wait
D. It drops connection
Correct Answer:
C
Chapter: 175
Q2611:
Which of the following is a key advantage of controlled access methods?
A. Increased collisions
B. Better channel utilization
C. Limited user access
D. Higher error rate
Correct Answer:
B
Chapter: 175
Q2612:
Controlled access is used to ______.
A. Allow free access to channel
B. Coordinate device transmission
C. Encrypt data packets
D. Transmit over long distances
Correct Answer:
B
Chapter: 175
Q2613:
Fill in the blank: Controlled access avoids ______ by ensuring only one device transmits at a time.
A. Delays
B. Errors
C. Collisions
D. Interruptions
Correct Answer:
C
Chapter: 176
Q2614:
Which of the following is a controlled-access method?
A. Ping Access
B. Carrier Sense
C. Reservation
D. Token Ring
Correct Answer:
C
Chapter: 176
Q2615:
What are the three main controlled-access methods?
A. Reservation, Polling, Token Passing
B. Token Ring, Reservation, CSMA
C. Polling, CSMA/CD, Token Holding
D. Token Delay, Polling, CSMA
Correct Answer:
A
Chapter: 176
Q2616:
In token passing, each station has a ______ and a successor.
A. Monitor
B. Connection
C. Predecessor
D. Neighbor
Correct Answer:
C
Chapter: 176
Q2617:
The station that comes before a given station in a logical ring is called the ______.
A. Neighbor
B. Receiver
C. Predecessor
D. Forwarder
Correct Answer:
C
Chapter: 176
Q2618:
What is the function of the TOKEN in token passing?
A. Encrypts data
B. Sets connection
C. Grants sending right
D. Initiates ring
Correct Answer:
C
Chapter: 176
Q2619:
In token passing, which term refers to the next station in the ring?
A. Primary station
B. Secondary station
C. Successor
D. Forwarding node
Correct Answer:
C
Chapter: 176
Q2620:
Fill in the blank: A ______ is a special packet that circulates in token passing.
A. Data frame
B. TOKEN
C. Command packet
D. Reservation frame
Correct Answer:
B