What is a frame in networking? MCQ with Answer and Explanation

Question
What is a frame in networking?
A. Data unit at the transport layer
B. Data unit at the network layer
C. Data unit at the application layer
D. Data unit at the data link layer
Answer: Option D
Solution (By JKSSB Mock Tests)
A frame is the layer 2 PDU (Protocol Data Unit), encapsulating the packet with MAC addresses.
This question belongs to: Computer Computer Networking
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Question #1
Which of the following is a key operational characteristic of a point-to-point network link?
A. It shares a single common cable line among dozens of different stations.
B. It provides a dedicated data channel between exactly two distinct network nodes.
C. It broadcasts data frames outward across all nearby devices automatically.
D. It depends entirely on Layer 3 multicast grouping schemes.
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Correct Answer: Option B

Explanation:
A point-to-point connection links two devices directly over a dedicated path without sharing the underlying transmission media with other hosts.
This question belongs to: Computer Computer Networking
Question #2
Which network topology layout links every node to a single shared central communication line known as the network backbone?
A. Bus Topology
B. Mesh Topology
C. Star Topology
D. Ring Topology
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Correct Answer: Option A

Explanation:
A bus topology connects all devices to a single shared central cable, often called the backbone line.
This question belongs to: Computer Computer Networking
Question #3
Which of the following is a disadvantage of a star topology?
A. If the central hub fails, the network fails
B. Difficult to add new devices
C. Low data rates
D. Expensive cabling compared to bus
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Correct Answer: Option A

Explanation:
Star topology relies on a central device; its failure disables the whole network.
This question belongs to: Computer Computer Networking
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