Which TCP port is used by Telnet?

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Multiple Choice

Which TCP port is used by Telnet?

Telnet uses TCP port 23, the standard destination port assigned for remote login services. In TCP/IP, services are associated with well-known ports so clients know where to connect. Port 22 is used by SSH for secure remote login, port 25 handles SMTP email transfer, and port 443 is for HTTPS web traffic. Telnet’s lack of encryption means credentials and commands travel in plaintext, which is why SSH is generally preferred for remote access today and Telnet is considered insecure for sensitive use.

Telnet uses TCP port 23, the standard destination port assigned for remote login services. In TCP/IP, services are associated with well-known ports so clients know where to connect. Port 22 is used by SSH for secure remote login, port 25 handles SMTP email transfer, and port 443 is for HTTPS web traffic. Telnet’s lack of encryption means credentials and commands travel in plaintext, which is why SSH is generally preferred for remote access today and Telnet is considered insecure for sensitive use.

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