Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 215
Q3401:
What layers does a link-layer switch operate on?
A. Physical and Transport
B. Application and Network
C. Physical and Data-link
D. Session and Application
Correct Answer:
C
Chapter: 215
Q3402:
Fill in the blank: A switch can check the ______ address in a data frame.
A. IP
B. MAC
C. DNS
D. Port
Correct Answer:
B
Chapter: 215
Q3403:
Which device has the capability to filter frames based on MAC addresses?
A. Hub
B. Switch
C. Router
D. Modem
Correct Answer:
B
Chapter: 215
Q3404:
What is a key difference between a hub and a switch?
A. Switch can regenerate signals only
B. Hub can filter frames
C. Switch filters based on destination MAC address
D. Hub works on data-link layer
Correct Answer:
C
Chapter: 215
Q3405:
Which device helps in eliminating collisions in a network?
A. Router
B. Hub
C. Switch
D. Bridge
Correct Answer:
C
Chapter: 215
Q3406:
Fill in the blank: A switch ______ the signal at the physical layer.
A. enriches
B. encrypts
C. regenerates
D. deletes
Correct Answer:
C
Chapter: 215
Q3407:
What allows a switch to send frames only to the correct device?
A. Frame duplication
B. Frame filtering
C. MAC broadcasting
D. Signal amplification
Correct Answer:
B
Chapter: 215
Q3408:
Switches are capable of connecting ________ devices.
A. identical
B. similar
C. heterogeneous
D. none of these
Correct Answer:
C
Chapter: 215
Q3409:
Which of the following can lead to loops in a switch-based network?
A. Single broadcasting LAN
B. One switch only
C. Redundant switches connected to broadcasting LANs
D. Using routers instead of switches
Correct Answer:
C
Chapter: 215
Q3410:
What issue arises when multiple switches connect multiple broadcasting LANs?
A. Interference
B. Signal loss
C. Loop problem
D. Data compression
Correct Answer:
C
Chapter: 215
Q3411:
Fill in the blank: Redundant switches in a system can create ______.
A. filters
B. bridges
C. loops
D. collisions
Correct Answer:
C
Chapter: 215
Q3412:
What is the term for a switch that learns and stores MAC addresses?
A. Static switch
B. Learning switch
C. Repeater switch
D. Caching switch
Correct Answer:
B
Chapter: 215
Q3413:
Switch eliminates the need for _______.
A. collisions
B. switching
C. bridging
D. broadcasting
Correct Answer:
A
Chapter: 215
Q3414:
Fill in the blank: Unlike hubs, switches eliminate ______ in network communication.
A. cables
B. collisions
C. packets
D. addresses
Correct Answer:
B
Chapter: 215
Q3415:
Which device improves performance by sending frames only where needed?
A. Hub
B. Switch
C. Router
D. Repeater
Correct Answer:
B
Chapter: 215
Q3416:
What is the main cause of a loop in a switched network?
A. Carrier sensing
B. Signal delay
C. Redundant links
D. Frame errors
Correct Answer:
C
Chapter: 215
Q3417:
Switches do not require ______ to avoid data collision.
A. carrier sensing
B. error detection
C. broadcasting
D. DNS lookup
Correct Answer:
A
Chapter: 215
Q3418:
Which of the following is not true about switches?
A. They create loops if misconfigured
B. They regenerate signals
C. They eliminate collisions
D. They always require carrier sensing
Correct Answer:
D
Chapter: 216
Q3419:
What is a characteristic of a spanning tree in graph theory?
A. Contains loops
B. Has multiple paths between nodes
C. Contains no loops
D. Only connects switches together
Correct Answer:
C
Chapter: 216
Q3420:
Fill in the blank: A spanning tree ensures that each LAN is connected through ______.
A. multiple redundant paths
B. one and only one path
C. an isolated segment
D. an external router
Correct Answer:
B