W11
- 1. To use Telnet Need to know the Internet address of the host ➢ It is necessary for the Telnet client to contact a host using the Internet address of the PC which you want to use.
- 2. Terminal emulation ➢ Terminal emulation determines how your keyboard will transmit informa- tion to the distant computer and how information will be displayed on your screen. The general type is VT-100 in Terminal emulation.
- 3. Client-server communication Client and server use the Telnet protocol. The Telnet assumes that each end of the connection is a network virtual terminal(NVT). The Network Virtual Terminal (NVT) is a bi-directional character device. The NVT has a printer and a keyboard. The printer responds to incoming data and the keyboard produces outgoing data which is sent over the TELNET connection. Reference : http://www.freesoft.org/CIE/RFC/854/
- 4. Telnet session ● When a data is ready for transmission, or when you give a command to transmit data, the data is sent across the Internet from your NVT keyboard. ● This data has host's IP address. Image : http://www.webnms.com/cli/telnet-window.html
- 5. NVT Commands Your IP address is also sent to get back the information. Specific commands are also sent that the other NVT for someting, for example, process to proceed. Certain Information NVT NVT Data and IP address Command GA(Telnet Go Ahead)
- 6. Data Processing and the Result The Telnet host receives and processes data you have sent. Packets must go through many Internet routers, so a delay might occur. “dir” Result FileA, fileB, fileC... Your NVT The Host lazy Command “dir” (Many) Internet routers