What is the role of a proxy server in network security? MCQ with Answer and Explanation

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What is the role of a proxy server in network security?

A. To provide physical connectivity

B. To hide internal network structure and filter traffic

C. To route packets

D. To assign IP addresses

Answer: Option B

Solution (By JKSSB Mock Tests)

Proxies act as intermediaries, hiding client identities and filtering content.

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Question #1

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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Question #2

What is the primary function of a Router in a computer network ecosystem?

A. To regenerate weak signals across long cable lengths.

B. To connect distinct networks and route data packets based on logical IP addresses.

C. To convert analog signals directly into serial bitstreams.

D. To act as a physical patch panel for structural wiring.

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Correct Answer: Option B

Explanation:
Routers operate at the Network Layer (Layer 3) and use IP addresses to determine the optimal path for forwarding data packets across different networks.

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Question #3

Which of the following is a connection-oriented protocol?

A. TCP

B. DNS

C. ICMP

D. UDP

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Correct Answer: Option A

Explanation:
TCP is connection-oriented; it establishes a session before sending data.

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