What is the default subnet mask assigned to standard Class C IP addresses under traditional classful addressing configurations? MCQ with Answer and Explanation

Question

What is the default subnet mask assigned to standard Class C IP addresses under traditional classful addressing configurations?

A. 255.0.0.0

B. 255.255.255.255

C. 255.255.255.0

D. 255.255.0.0

Answer: Option C

Solution (By JKSSB Mock Tests)

Class C networks allocate 24 bits to the network ID, which corresponds to a default subnet mask of 255.255.255.0.

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Question #1

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Which device is used to connect two dissimilar networks, such as a LAN to a WAN?

A. Hub

B. Switch

C. Bridge

D. Router

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Correct Answer: Option D

Explanation:
A router connects different networks, often with different media and addressing schemes.

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Question #2

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Which mechanism enables an internet router to modify packet headers, allowing thousands of private internal LAN hosts to navigate the web through a single public IP address?

A. DHCP lease management

B. Address Resolution lookup

C. Network Address Translation (NAT)

D. Domain Name mapping

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Correct Answer: Option C

Explanation:
NAT converts private internal IP addresses to a public IP address, conserving IPv4 space and adding an extra layer of internal security.

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