Which of the following statements is true about TACAS+?

TACACS+ is a protocol developed by Cisco that serves primarily for remote authentication and is known for providing both authentication and accounting services. It allows for secure communication between the user and the server, which is crucial for maintaining the integrity and confidentiality of user credentials and session details.

The authentication aspect means that TACACS+ can verify the identity of users trying to access a network or system. Meanwhile, the accounting services track the usage of network resources by those authenticated users, which is key for monitoring which users were active and what operations they performed.

These dual capabilities make TACACS+ a valuable tool in network security management, supporting organizations in their compliance and auditing efforts. Addressing the other statements, it is still a widely used protocol in many enterprises, is not limited to SSL encryption, and is designed to authenticate users regardless of whether they are internal or external to an organization, thereby demonstrating its flexibility. Therefore, the statement regarding TACACS+ providing both authentication and accounting services stands out as accurate.