Allowing 4 terminals to access the Internet at the same time means that, when using a cat, 4 computers can be connected to the Internet at the same time (a total of 4 wireless cable ITV). Of course, if there is a cat, and then connected to the router, the number of computers connected to the router is unlimited, but the more the network speed is divided into less, there is a slow network speed. Of course, users can buy their own routes, the premise is that broadband direct LAN, is fiber optic, if it is ADSL telephone line connection, it must need a cat. Terminals are typically \"dumb\" user devices that are connected to a centralized mainframe system, such as an IBM mainframe computer. The terminal receives keyboard input from the user and sends it to the host system.