Telnet is

AA telephone network

BA teller network

CA standard internet protocol for remote login ✓ Correct

DA dial-up program

Correct answer: (C) A standard internet protocol for remote login

Explanation

Telnet is a standard internet protocol that lets a user log in to and control a remote computer over a network.

A telephone network carries voice calls and is not what Telnet means.

A teller network belongs to banking terminals, unrelated to remote login.

A dial-up program connects to an ISP by phone line and is not the remote-login protocol.

Telnet sends keystrokes and screen output as plain text, so it lacks encryption.

Because it is insecure, Telnet has largely been replaced by SSH.

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