Terminal Access Controller Access Control system

Hi,

Am planing to centralized all authentication, authorization and accounting services via one server. I was advised to use the TACACS +, but I haven’t used it before and was wondering if anyone that have used it before can give some advantages, and some knowledge based on how it function over the network. I only know that TACACS + provides access control for routers, network access servers and other networked computing devices via one server..

thx

Nathan