Which major vendor integrated TACACS into its product offerings for AAA architecture?

TACACS, which stands for Terminal Access Controller Access-Control System, is a protocol used for providing centralized Authentication, Authorization, and Accounting (AAA) for users who access network services. The major vendor known for integrating TACACS into its product offerings is Cisco. Cisco developed TACACS+ which is a more secure version of the original protocol, and it is widely used in network devices, allowing for centralized control over user access. This integration has made it a vital part of Cisco's security infrastructure, providing robust mechanisms for managing user permissions and ensuring secure access to network resources.

Cisco’s products, particularly routers and switches, utilize TACACS+ to enhance the security of network management and to control user sessions more effectively. The widespread adoption of TACACS+ in Cisco environments highlights the company's commitment to security in networking solutions.