1. NVT (Network Virtual Terminal) is a bi-directional device. It has a keyboard and a printer. The keyboard produces outgoing data and the printer responds to the incoming one. The outgoing data goes out over the Telnet connection.
2. NYT uses the client-server architecture and it is treated as a half-duplex device.
3. Figure below illustrates the use of NVT by Telnet.
4. The character set for NVT is defined by the Telnet protocol. It is fairly easy to define the NVT format.
5. NVT uses the standard 7-bit ASCII representation for data. It includes 95 printable characters (letters, punctuation marks, digits, etc.) and three control codes.