I am new to an environment that uses Cisco Secure ACS appliances. Sometimes I hear it referred to as TACACS which I think means that Cisco Secure ACS is being used to authenticate user ID and password from a Cisco router using TACACS protocol. But is that protocol only used for Cisco routers? Does ACS listen for LDAP requests?
Can someone help or point me to some entry level docs on how Cisco Secure interacts with different clients sending authentication requests?