Which three options are common examples of AAA implementation on Cisco routers?

Which three options are common examples of AAA implementation on Cisco routers? (Choose three.)

A.
authenticating remote users who are accessing the corporate LAN through IPsec VPN connections

B.
authenticating administrator access to the router console port, auxiliary port, and vty ports

C.
implementing PKI to authenticate and authorize IPsec VPN peers using digital certificates

D.
tracking Cisco NetFlow accounting statistics

E.
securing the router by locking down all unused services

F.
performing router commands authorization using TACACS+

Explanation: