What means VTY interface?

Virtual teletype (VTY) is a command line interface (CLI) created in a router and used to facilitate a connection to the daemon via Telnet, a network protocol used in local area networks.

To connect to a VTY, users must present a valid passWord.The VTY interface has three restricted mode commands:

VTY View: Enables read-only interface access

VTY Enable: Enables read-write access to the CLI

VTY Other: Includes modes like Trivial File Transfer Protocol (TFTP)

VTY uses a set of CLI command actions, which depend on the three types of actions CLI can perform:

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