Which protocol is used to retrieve email from a server? MCQ with Answer and Explanation

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Which protocol is used to retrieve email from a server?

A. POP3

B. FTP

C. HTTP

D. SMTP

Answer: Option A

Solution (By JKSSB Mock Tests)

POP3 (Post Office Protocol) is used to download email from a server to a client.

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Question #1

Which network layer protocol is used for error reporting and diagnostic functions?

A. UDP

B. ICMP

C. TCP

D. ARP

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Correct Answer: Option B

Explanation:
ICMP (Internet Control Message Protocol) is used for error messages and diagnostics like ping.

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Question #2

What is the maximum number of IP addresses in a Class C network?

A. 254

B. 16,777,214

C. 65534

D. 256

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Correct Answer: Option A

Explanation:
Class C has 8 host bits, giving 2^8 = 256 addresses, with 2 reserved (network and broadcast), so 254 usable.

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Question #3

What operational feature distinguishes an intelligent network switch from a basic hardware hub?

A. Switches lack physical Ethernet connections.

B. Switches analyze incoming frames and forward them directly to specific ports based on destination MAC addresses.

C. Switches use analog modulation steps exclusively.

D. Switches run entirely at the physical layer without checking data links.

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Correct Answer: Option B

Explanation:
Switches inspect incoming frames at Layer 2, using an internal MAC address table to forward data directly to the target port rather than broadcasting it to all ports.

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