What does a modem do? MCQ with Answer and Explanation

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What does a modem do?

A. Connects a LAN to a WAN by converting digital signals to analog and vice versa

B. Filters network traffic

C. Assigns IP addresses

D. Amplifies signals

Answer: Option A

Solution (By JKSSB Mock Tests)

A modem (modulator-demodulator) converts digital data from a computer to analog for transmission over telephone lines and vice versa.

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Question #1

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Which type of network is the Internet considered?

A. PAN

B. LAN

C. WAN

D. MAN

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Correct Answer: Option C

Explanation:
The Internet is the largest example of a WAN, spanning the entire globe.

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Question #2

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Which of the following is a multi-point topology?

A. Star

B. Bus

C. Ring

D. All of the above

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Correct Answer: Option D

Explanation:
All these topologies have multiple devices sharing a medium or central point.

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Question #3

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What structural architecture is used by a peer-to-peer (P2P) network model?

A. Every computer node can act as both a client that requests data and a server that shares data directly with other devices.

B. A high-capacity central mainframe coordinates all data assets.

C. Nodes communicate exclusively via analog phone line modems.

D. Devices connect to a single central cable using structural terminators.

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Correct Answer: Option A

Explanation:
A P2P network distributes roles evenly across all nodes, allowing devices to share resources directly without a central server.

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