Which port is used by rlogin?

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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

Which port is used by rlogin?

Explanation:
rlogin uses the TCP port 513. This is the standard port assigned to the rlogin service in the IANA registry, so any rlogin connection targets 513 by default. The other ports correspond to different services (a portmapper RPC service, remote shell, and Telnet), so they aren’t used by rlogin. Remember that rlogin is insecure because credentials are sent in plaintext, so SSH on port 22 is the secure alternative.

rlogin uses the TCP port 513. This is the standard port assigned to the rlogin service in the IANA registry, so any rlogin connection targets 513 by default. The other ports correspond to different services (a portmapper RPC service, remote shell, and Telnet), so they aren’t used by rlogin. Remember that rlogin is insecure because credentials are sent in plaintext, so SSH on port 22 is the secure alternative.

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