Which class of IP address is used for multicast? MCQ with Answer and Explanation

Question
Which class of IP address is used for multicast?
A. Class A
B. Class C
C. Class D
D. Class B
Answer: Option C
Solution (By JKSSB Mock Tests)
Class D (224.0.0.0 to 239.255.255.255) is reserved for multicast groups.
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Question #1
Which of the following is a key operational characteristic of a point-to-point network link?
A. It depends entirely on Layer 3 multicast grouping schemes.
B. It shares a single common cable line among dozens of different stations.
C. It broadcasts data frames outward across all nearby devices automatically.
D. It provides a dedicated data channel between exactly two distinct network nodes.
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Correct Answer: Option D

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 topology integrates multiple star networks together by anchoring their central switches back to a primary shared bus backbone line?
A. Linear Topology
B. Mesh Topology
C. Tree Topology
D. Ring Topology
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Correct Answer: Option C

Explanation:
A tree topology connects multiple star-configured subnets to a primary bus backbone or central root switch in a hierarchical layout.
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Question #3
Which type of device operates at Layer 7 of the OSI model to translate formatting and protocol rules between entirely incompatible network architectures?
A. Layer 1 Repeater
B. Network Gateway
C. Passive Hub block
D. Layer 2 Switch
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Correct Answer: Option B

Explanation:
A gateway acts as a protocol converter, translating data formats and communication rules between completely different network architectures.
This question belongs to: Computer Computer Networking
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