AAA Components
¨AAA server
–Authenticates users accessing a device or network
–Authorizes user to perform specific activities
–Performs accounting of device or user activities
¨Network Access Server (NAS) or Access Device
–A router, switch, or other network device that can perform AAA functions on users or devices connecting to it
¨RADIUS or TACACS+
–Protocols that can be used by an access device to communicate with the AAA server