Which port and protocol is used for POP3 mail retrieval?

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Prepare for the CPSA Port Numbers Exam with quizzes on port numbers, services, and protocols. Each question is accompanied by hints and detailed explanations. Get exam-ready with our comprehensive study tool!

Multiple Choice

Which port and protocol is used for POP3 mail retrieval?

Explanation:
POP3 is the protocol used to retrieve email from a mail server to a client. The standard port for POP3 over TCP is 110, which is why this is the correct choice for mail retrieval. If you need encryption, the secure variant uses a different port (995 for POP3S). The other options point to different services: 25 is SMTP for sending mail; 143 is IMAP, another retrieval protocol; 993 is IMAP over TLS, not POP3.

POP3 is the protocol used to retrieve email from a mail server to a client. The standard port for POP3 over TCP is 110, which is why this is the correct choice for mail retrieval. If you need encryption, the secure variant uses a different port (995 for POP3S). The other options point to different services: 25 is SMTP for sending mail; 143 is IMAP, another retrieval protocol; 993 is IMAP over TLS, not POP3.

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