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Virtual Teletype (VTY)

Definition - What does Virtual Teletype (VTY) 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 (VTY)

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:

  • Movement
  • Editing
  • Advanced

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