Router that communicates with routers in other autonomous systems.

Internal cooling fan used in larger router and switch chassis such as the Cisco AGS+, the Cisco 7000, and the LightStream 2020.

The minimal configuration information entered when a new router, switch, or other configurable network device is installed on a network. The basic configuration for a LightStream 2020 ATM switch, for example, includes IP addresses, the date, and parameters for at least one trunk line. The basic configuration enables the device to receive a full configuration from the NMS.

Compact Gateway Server. Cisco midrange multiprotocol router designed for medium to small regional and district environments. The CGS is a 2-slot router that supports up to four interfaces (all of the same type).

Challenge Handshake Authentication Protocol. Security feature supported on lines using PPP encapsulation that prevents unauthorized access. CHAP does not itself prevent unauthorized access, it merely identifies the remote end. The router or access server then determines whether that user is allowed access. Compare to PAP.

Any of the Cisco 1000 series LAN Extenders and routers. The Cisco 1000 series are easy-to-install, inexpensive, multiprotocol access products designed for small offices and other remote sites. The Cisco 1000 series includes an ISDN router, an asynchronous router, and LAN extenders.