TELNET : Java Glossary


A command line Internet protocol to log into a remote computer indirectly through a chain of telecommunications links. It is a bit like using an old DEC (Digital Equipment Corporation) VT-100 dumb terminal. The net effect is as if your computer were a character based terminal directly attached to the remote computer. You often log in with the id of guest or anonymous, which will give you low privilege. For security, often you telnet over SSH (Secure Shell).

Telnet is also useful for debugging to see if you can at least get a packet through. To test an SMTP (Simple Mail Transfer Protocol) mail server for example you would telnet on port 25. This lets you know firewalls are not blocking you.

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