Ann has taken over as the new head of the IT department. One of her first assignments was to implement AAA in preparation for the company's new telecommuting policy. When she takes inventory of the…

RADIUS (Remote Authentication Dial-In User Service) is a widely adopted, vendor-neutral AAA protocol defined in RFC 2865 and supported by network equipment from virtually all manufacturers. In a mixed-vendor environment, RADIUS ensures interoperability across different devices while providing centralized authentication, authorization, and accounting for remote access. This makes it the most practical and scalable solution for Ann's requirement.

LDAP is a directory access protocol used to query and modify directory services and is not itself an AAA server protocol capable of managing network access control for telecommuting.

SAML is a federation standard for web-based single sign-on between identity providers and service providers and is not used for network-level AAA in the context of remote access to network infrastructure.

TACACS+ is primarily associated with Cisco infrastructure and, while functional in Cisco-heavy environments, is not as universally supported across mixed-vendor networks as RADIUS.