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Telnet is a command-line tool that provides access to a command-line interface on a remote host. As it uses Transmission Control Protocol (TCP), it may also be used to test TCP connectivity with a remote host. Because of serious security concerns when using Telnet over an open network such as the Internet, its use for this purpose has waned significantly in favor of SSH.[1] The following activities will show you how to use Telnet.


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  1. Wikipedia: Telnet
  2. Wikipedia: netcat


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  1. Internet Protocol Analysis - Transport Layer


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  1. Install the Telnet Client (Windows)
  2. Test an HTTP Connection
  3. Test an SMTP Connection

See also

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