What is the role of a DNS resolver? MCQ with Answer and Explanation

Question

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What is the role of a DNS resolver?

A. To assign IP addresses

B. To forward packets

C. To filter traffic

D. To query DNS servers for domain name resolution

Answer: Option D

Solution (By JKSSB Mock Tests)

A DNS resolver is a client that initiates queries to DNS servers to translate domain names.

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Question #1

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Which network topology provides the highest redundancy because each device is connected to every other?

A. Mesh

B. Bus

C. Ring

D. Star

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Correct Answer: Option A

Explanation:
Full mesh topology connects each node to every other, offering multiple paths and high redundancy.

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Question #2

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Which of the following is a private IP address designated for exclusive use within local area networks?

A. 10.0.0.1

B. 168.192.1.1

C. 200.100.50.1

D. 8.8.8.8

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Correct Answer: Option A

Explanation:
The 10.0.0.0 to 10.255.255.255 range is defined by RFC 1918 as a private Class A IP block reserved for internal networks.

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Question #3

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Which network type covers a city or metropolitan area?

A. LAN

B. WAN

C. MAN

D. PAN

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Correct Answer: Option C

Explanation:
MAN (Metropolitan Area Network) spans a city or large campus, larger than LAN but smaller than WAN.

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