* Question
| What is the working principle of the remote login service? |
* Answer
| The remote login service is implemented by a remote terminal protocol, which uses the transport layer’s TCP for transmission.The working mode is client/server mode, which consists of two parts: the client and the TELNET server.When a user wants to request the TELNET service, he initiates a TELNET client process on the client, and sends a request to the TELNET server through port 23, and after receiving the request, the TELNET server process starts a child process to respond to the TELNET request.Provide users with specific services,The client and TELNET server in the remote login service may be heterogeneous. The Internet uses Network Virtual Terminal (NVT) to adapt to the differences between different systems, that is, between the client process and the TELNET server process.It is the NVT format.as the picture shows. |
COMMENTS