Means connected to the terminal access router and a terminal device, data communication is completed between the terminal device and the other terminal device via a router.
Terminal access router implemented in two types: terminal access initiator and a recipient access terminal.
The initiator initiates the access terminal is one of a TCP connection request, the TCP connection as a client, typically a router.
The access terminal is receiving party responds to a TCP connection request, the TCP connection as a server, may be FEP or router.
Either as originating router or receiver, after the TCP connection is established long, it can be transparent to transmit data stream on the terminal device to the peer TCP connection.
Generally there are five terminal access:
the TTY (real terminal) access terminal, initiated by a router, the receiver is FEP. Service terminal through an asynchronous serial connection to the router, the router connected to the FEP through a network, application services run on the FEP, FEP interact with the program by ttyd router, the traffic through the router to the push service terminal screen. Router is responsible for transparent transmission between terminal connected service data and FEP.
Telnet terminal access
service terminal to the router through an asynchronous serial connection (Telnet Client), linked by a network router to the FEP (Telnet Server), application services run on the FEP, FEP or Telnet by interacting with router, and further establishing a data channel between the terminal and the FEP.
ETelnet terminal access
service terminal is connected to the router through an asynchronous serial interface (ETelnet Client), the router is connected to the FEP (ETelnet Server) via a network, application services run on the FEP, FEP through specific interaction with router encryption Telnet, , thereby establishing a data channel between the terminal and the FEP.
SSH terminal access
Service terminal to the router through an asynchronous serial connection (secure shell), linked by a network router to the FEP (SSHServer), application services run on the FEP, FEP SSH standard way to interact with the router, thereby establishing pre-terminals and a data channel between machines.
Terminal access RTC
RTC initiated by a router, the router is the receiving side. RTC terminal access is another typical application of the terminal access, through a router that interconnects a local terminal and a remote terminal equipment for data exchange, and data monitoring functions.
RTC asynchronous mode (asynchronous mode only supports RTC), the monitoring terminal and remote monitoring terminal is a data center are connected to the router through an asynchronous serial, routers exchange data through the IP network. Generally, the router is connected to the monitoring device as initiator (RTC Client), the monitoring device can initiate a connection at any time, to retrieve data monitoring equipment. And the router is connected to the monitoring device as a receiver (RTC Server), the monitoring device always ready to receive a connection request to transmit the monitoring data.
Cisco training institutions allow you three minutes to understand simple terminal access technology -ielab
