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A telnet program is essentialy a remote terminal application, used to connect to a remote computer and interact with it in text mode (command line) only. It operates over a TCP/IP network, and uses TCP port 23.

The telnet conversation is completely open, not encrypted in any way, starting from the logon (username/password entry), and therefore should be avoided on untrusted networks, where it can be easily sniffed ("overheard" by anybody that analyzes the network traffic).

A secure alternative to telnet is called ssh (secure shell).

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15y ago

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