MDA - internet/telnet-ssh/telnet

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Telnet

- telnet-client [ communicator ]
- telnet-server [ communicator ]

- Telnet
- SSH, Secure Shell

Types:

usage: for interactive access to remote machine -- for debugging text-based protocols (HTTP, SMTP, ...) -- for service discovery
drawbacks: data and password in clear -- expensive: one keystroke -> 3 TCP packets
history: in earlier times used to access cataloques, databases, services, etc -> mostly replaced by the web
invocation: telnet []
Comment:: runs on top of TCP/IP; default server port 23

References: