CISSP All Domains Practice test 9

RADIUS (Remote Authentication Dial-In User Service): A networking protocol that provides centralized Authentication, Authorization, and Accounting management for users who connect and use a network service. Widely used by ISPs (Internet service providers) and large organizations to manage access to IP networks, APs, VPNs, Servers, 802.1x, etc. Uses a client/server protocol that runs in the application layer, and can use either TCP or UDP as transport. Network access servers, the gateways that control access to a network, usually contain a RADIUS client component that communicates with the RADIUS server. Use UDP ports 1812 for authentication and 1813 for accounting, can use TCP as the transport layer with TLS for security.