Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 166
Q2441:
Which of the following is NOT part of the MAC sub-layer's responsibility?
A. Multiple-access protocols
B. Addressing on shared links
C. Establishing communication sessions
D. Coordinating link access
Correct Answer:
C
Chapter: 166
Q2442:
Which type of link requires a multiple-access protocol to coordinate node access?
A. Unicast
B. Broadcast
C. Point-to-point
D. Full-duplex
Correct Answer:
B
Chapter: 166
Q2443:
Fill in the blank: Multiple-access protocols belong to the _______ sub-layer.
A. Physical
B. Network
C. Transport
D. Media Access Control (MAC)
Correct Answer:
D
Chapter: 166
Q2444:
What is the role of a multiple-access protocol in a broadcast network?
A. To enable reliable communication
B. To avoid data collisions
C. To encrypt data
D. To improve network speed
Correct Answer:
B
Chapter: 166
Q2445:
Which of the following protocols falls under the MAC sub-layer?
A. HTTP
B. TCP/IP
C. Carrier Sense Multiple Access (CSMA)
D. FTP
Correct Answer:
C
Chapter: 166
Q2446:
Which of the following is an example of a protocol used in the MAC sub-layer?
A. IPv6
B. CSMA/CD
C. UDP
D. FTP
Correct Answer:
B
Chapter: 166
Q2447:
Fill in the blank: The MAC sub-layer operates between the _______ and the Network layer.
A. Transport layer
B. Physical layer
C. Data link layer
D. Network layer
Correct Answer:
C
Chapter: 166
Q2448:
What is the main function of a multiple-access protocol in shared network links?
A. To divide the bandwidth equally
B. To control when each node can access the link
C. To encrypt the communication
D. To provide flow control
Correct Answer:
B
Chapter: 166
Q2449:
Which of the following is the primary task of the MAC sub-layer in a network?
A. Perform error detection
B. Control access to the shared communication link
C. Provide reliable data transfer
D. Ensure data privacy
Correct Answer:
B
Chapter: 166
Q2450:
What type of link does the MAC sub-layer typically manage?
A. Unicast links
B. Broadcast and multipoint links
C. Full-duplex links
D. Mesh networks
Correct Answer:
B
Chapter: 166
Q2451:
Which of the following is a key challenge in multiple-access protocols for broadcast networks?
A. Packet fragmentation
B. Link contention
C. IP routing
D. Packet sequencing
Correct Answer:
B
Chapter: 167
Q2452:
In random-access or contention, which station has control over others?
A. First station
B. Leader station
C. No station
D. One with the highest priority
Correct Answer:
C
Chapter: 167
Q2453:
In random-access protocols, the decision to send data depends on _______.
A. the size of the data
B. packet type
C. the state of the medium
D. idle or busy state
Correct Answer:
C
Chapter: 167
Q2454:
What does the station check before sending data in a random-access protocol?
A. Network topology
B. Medium state
C. Packet length
D. Transmission speed
Correct Answer:
B
Chapter: 167
Q2455:
Fill in the blank: In random-access protocols, the station’s decision to send data depends on whether the medium is _______ or _______.
A. idle, busy
B. ready, free
C. clear, blocked
D. empty, full
Correct Answer:
A
Chapter: 167
Q2456:
Which of the following describes the relationship between stations in a random-access protocol?
A. One station has priority
B. No station is superior
C. One station controls the medium
D. Stations are grouped in clusters
Correct Answer:
B
Chapter: 167
Q2457:
What is the key factor in deciding whether to send data in random-access protocols?
A. Protocol timing
B. Signal strength
C. Medium state
D. Packet content
Correct Answer:
C
Chapter: 167
Q2458:
In random-access protocols, if the medium is busy, a station _______ send its data.
A. will immediately
B. waits until it’s free
C. sends without checking
D. chooses a random time
Correct Answer:
B
Chapter: 167
Q2459:
Fill in the blank: In a random-access protocol, a station makes a decision based on whether the medium is _______.
A. empty
B. full
C. busy
D. idle
Correct Answer:
D
Chapter: 167
Q2460:
Which statement best describes a random-access protocol?
A. A station always has control
B. Stations decide when to send based on medium state
C. One station is always the leader
D. The protocol is not based on contention
Correct Answer:
B