The behavior of the following sequences is based on the VT100 and derived terminal emulator technologies, most specifically the xterm terminal emulator. It's a shame so many terminal emulators identify themselves as xterm, but don't actually support xterm. SecureCRT supports VT100 emulation, telnet, SSH, kerberos, and serial port connections. It supports several network protocols, including SCP, SSH, Telnet, rlogin, and raw socket connection. For instance, the fancy new VT100 released in 1978 supported ANSI color, so if a user identified the terminal type as vt100, then a computer could deliver color output, while a basic serial device might not have such an option. VanDyke Software's VT100 terminal emulator is available for most major platforms-Windows, Mac, and Linux. Terminal emulators replicate the functionality of a traditional computer terminal to provide users with access to a local or distant host.

The application features support for a number of terminal types from DEC VT100 to DEC VT382.

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