Which service uses port 25 by default?

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Multiple Choice

Which service uses port 25 by default?

Explanation:
Port numbers map to specific network services, and SMTP is the protocol used to deliver mail between mail servers. By convention, SMTP listens on port 25 by default for its server-to-server relaying. This makes port 25 the standard entry point for SMTP traffic. Other common ports are 80 for HTTP, 123 for NTP, and 110 for POP3 (with 995 for secure POP3). So the service that uses port 25 by default is SMTP.

Port numbers map to specific network services, and SMTP is the protocol used to deliver mail between mail servers. By convention, SMTP listens on port 25 by default for its server-to-server relaying. This makes port 25 the standard entry point for SMTP traffic. Other common ports are 80 for HTTP, 123 for NTP, and 110 for POP3 (with 995 for secure POP3). So the service that uses port 25 by default is SMTP.

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