Glossary

AAA (authentication, authorization, accounting)—

Often pronounced “triple a.”

ACS (Access Control Server)—

The Cisco Secure ACS is an integrated RADIUS and TACACS+ server for authentication, authorization, and accounting.

CCO (Cisco Connection Online)—

The Cisco Systems home page on the Internet. Located at www.cisco.com.

CLI (command-line interface)—

The UNIX-style command interface that is used to configure Cisco internetworking devices.

NAS (network access server)—

The connection point to the network for remote services such as dial-in users over PPP.

NOS (network operating system)—

The operating system of the network. This provides users with services such as file and print sharing. Common NOSs include Microsoft Windows NT and Novell NetWare.

RADIUS (Remote Access Dial-In User Service)—

A protocol used to authenticate users on a network.

TACACS+ (Terminal Access Controller Access Control System Plus)—

A protocol used to authenticate users on a network. Also provides authorization and accounting facilities.