Terminal ACCESS CONTROLLER Access-Control SYSTEM (TACACS): This is a remote authentication protocol that is used to communicate with an authentication server commonly used in UNIX networks. TACACS ALLOWS a remote access server to communicate with an authentication server in order to determine if the user has access to the network.

RADIUS: Remote Authentication Dial In User Service (RADIUS) is an AAA (authentication, authorization, and accounting) protocol for controlling access to network resources. RADIUS is commonly used by ISPs and corporations managing access to Internet or internal networks across an array of access technologies including modem, DSL, wireless and VPNs.

Terminal Access Controller Access-Control System (TACACS): This is a remote authentication protocol that is used to communicate with an authentication server commonly used in UNIX networks. TACACS allows a remote access server to communicate with an authentication server in order to determine if the user has access to the network.

RADIUS: Remote Authentication Dial In User Service (RADIUS) is an AAA (authentication, authorization, and accounting) protocol for controlling access to network resources. RADIUS is commonly used by ISPs and corporations managing access to Internet or internal networks across an array of access technologies including modem, DSL, wireless and VPNs.