NNTP (Network News Protocol) uses which port number?

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Prepare for the CPSA Port Numbers exam with multiple choice questions and detailed explanations. Understand key protocols and services to excel in your test.

Multiple Choice

NNTP (Network News Protocol) uses which port number?

Explanation:
Understanding port numbers for well-known services helps you see at a glance how clients and servers talk. NNTP, used for Usenet news transfer, uses port 119 by default for plain, unencrypted connections. When you secure it with TLS, the commonly used secure port is 563, but the standard non-secure port is 119. The other ports listed belong to different services: 110 is for POP3 (email retrieval) and 123 is for NTP (time synchronization). So the port associated with NNTP is 119.

Understanding port numbers for well-known services helps you see at a glance how clients and servers talk. NNTP, used for Usenet news transfer, uses port 119 by default for plain, unencrypted connections. When you secure it with TLS, the commonly used secure port is 563, but the standard non-secure port is 119. The other ports listed belong to different services: 110 is for POP3 (email retrieval) and 123 is for NTP (time synchronization). So the port associated with NNTP is 119.

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