What does VTN mean?

VTN stands for Virtual Terminal Network, which refers to the network virtual terminal. VTN consists of two parts, namely: 1. Output device, usually a monitor, used to output remote data; 2. Input device, used for local data input.

Network Virtual Terminal (VTN), Virtual Terminal Network

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Composition:

Network virtual terminal VTN includes two parts:

Output device: output remote data, usually a monitor

Input device: local data input

Data format:

The data transmitted on the network virtual terminal VTN uses 8-bit byte data, of which

the highest bit is 0: general data

The byte with the highest bit being 1: used for VTN commands

At the beginning of communication, both communicating parties support a basic subset of VTN terminal features (can only distinguish what is data and what is a command), In order to communicate at the lowest level, on this basis, the two parties negotiate through VTN commands to determine the higher-level characteristics of VTN and realize the expansion of NVT functions.

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