Virtual teletype definition – Glossary (2024)

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Virtual teletype definition – Glossary? ›

Virtual teletype (VTY) is a command line interface that gives users access to a device's control plane, most often in network devices like routers and switches. By using it, administrators can configure, manage, and monitor the device remotely. VTY lines are logical interfaces of a device.

The term “vty” stands for Virtual teletype. VTY is a virtual port and used to get Telnet or SSH access to the device. VTY is solely used for inbound connections to the device. These connections are all virtual with no hardware associated with them. Google ADs.

Virtual Teletype (VTY) lines indicate the possible simultaneous connections allowed to a particular router from a socket availability perspective, being 0 through 5 or any arbitrary range, this is what signifies.

Virtual teletype (VTY) is a command line interface that gives users access to a device's control plane, most often in network devices like routers and switches. By using it, administrators can configure, manage, and monitor the device remotely. VTY lines are logical interfaces of a device.

TTY is a physically connected one, via the serial/console port. VTY is a virtually connected one, via telnet or SSH.

A VTY line is used for SSH and Telnet access to the device. Here you configure login parameters and password. A VLAN interface is in simplest terms the Layer 3 interface for a VLAN, allowing you to configure an IP address on it.

Second, by default Telnet is associated with the VTY lines. Telnet uses TCP port number 23 and is one of the most commonly used protocols for remote access. However, telnet doesn't have any type of confidentiality. In other words, it has no encryption mechanism.

It defines how many VTY's that are active on the device and essentially how many simultaneous remote connections you want to allow/support. In case of "line vty 0 4", you can have five simultaneous connections.

Virtual terminals are logical connections from the network to the router; these are typically telnet or rlogin connections. When a user telnets to a router from the network, as in Figure 4-2, the router starts an EXEC process to handle this connection.

A VTY line is used for SSH and Telnet access to the device. Here you configure login parameters and password. A VLAN interface is in simplest terms the Layer 3 interface for a VLAN, allowing you to configure an IP address on it.

What is the difference between Vty and console? ›

console 0 is the physical console port on the switch/router you plug into. line vty is when you remote into the switch/router via telnet or ssh. the config-line is letting you know you are currently in configuration mode for that specific line. Some commands are also different in relation to them.

The Virtual Type Terminal (VTY) manages and monitors users who log in to the device using VTY user interfaces. When a user's terminal connects to the device using Telnet or Secure Shell (SSH), a VTY is set up.