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? MCQ with Answer and Explanation

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. Domain Name mapping
C. Address Resolution lookup
D. Network Address Translation (NAT)
Answer: Option D
Solution (By JKSSB Mock Tests)
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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Which class of IP address is reserved for experimental purposes?
A. Class A
B. Class E
C. Class D
D. Class C

Correct Answer: Option B


Explanation:
Class E (240.0.0.0 to 255.255.255.255) is reserved for experimental and future use.

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Question #2
What is the function of a firewall in a network?
A. To route packets
B. To resolve domain names
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Correct Answer: Option D


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A firewall filters network traffic based on security rules to protect the network.

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Which topology requires a central controller (like a hub or switch) to manage data transmission?
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Correct Answer: Option D


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Star topology relies on a central device to which all nodes connect.

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