Which address block represents the standard 32-bit IPv4 multicast address group space under traditional classful sorting hierarchies? MCQ with Answer and Explanation

Question

Which address block represents the standard 32-bit IPv4 multicast address group space under traditional classful sorting hierarchies?

A. 240.0.0.0 to 255.255.255.255

B. 224.0.0.0 to 239.255.255.255

C. 0.0.0.0 to 127.255.255.255

D. 192.168.0.0 to 192.168.255.255

Answer: Option B

Solution (By JKSSB Mock Tests)

Class D addresses (224.0.0.0 to 239.255.255.255) are reserved globally for multicast traffic targeting specific groups of devices.

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Question #1

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Which of the following is an example of a Class C IP address based on the traditional classful addressing scheme?

A. 172.16.254.1

B. 10.0.0.5

C. 240.0.0.1

D. 192.168.1.50

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Correct Answer: Option D

Explanation:
Class C IP addresses have a first octet range spanning from 192 to 223, commonly used for small local area networks.

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Question #2

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Which device operates at the data link layer and uses MAC addresses to forward data?

A. Router

B. Hub

C. Switch

D. Gateway

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Correct Answer: Option C

Explanation:
A switch uses MAC addresses to forward frames within a local network, operating at layer 2.

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Question #3

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What is the main difference between a hub and a switch?

A. Hub broadcasts to all ports; switch forwards to specific port based on MAC

B. Hub works at layer 3; switch at layer 2

C. Hub forwards data based on IP, switch based on MAC

D. Hub is intelligent; switch is not

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Correct Answer: Option A

Explanation:
A hub sends data to all ports, while a switch learns MAC addresses and sends only to the destination port.

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