What Does Virtual Teletype Mean?
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.
Techopedia Explains Virtual Teletype
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: