Which of the following is an example of a Class C IP address based on the traditional classful addressing scheme? MCQ with Answer and Explanation

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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. 192.168.1.50

B. 172.16.254.1

C. 240.0.0.1

D. 10.0.0.5

Answer: Option A

Solution (By JKSSB Mock Tests)

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 #1

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

A. 224.0.0.0 to 239.255.255.255

B. 0.0.0.0 to 127.255.255.255

C. 240.0.0.0 to 255.255.255.255

D. 192.168.0.0 to 192.168.255.255

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Correct Answer: Option A

Explanation:
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 #2

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What is the function of a DNS cache?

A. Stores IP address mappings

B. Stores MAC addresses

C. Stores routing tables

D. Stores recently resolved domain names for faster lookup

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Correct Answer: Option D

Explanation:
DNS caching speeds up resolution by storing previous queries.

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Question #3

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What is the function of a router's ARP table?

A. Stores mappings between IP addresses and MAC addresses

B. Stores DHCP leases

C. Stores routing information

D. Stores DNS records

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Correct Answer: Option A

Explanation:
The ARP table on a router caches IP-to-MAC mappings for local devices.

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