Which statements about IP-based explicit proxy authentication are true? (Choose two.)

Which statements about IP-based explicit proxy authentication are true? (Choose two.)

A. IP-based authentication is best suited to authenticating users behind a NAT device.

B. Sessions from the same source address are treated as a single user.

C. IP-based authentication consumes less FortiGate-s memory than session-based authentication.

D. FortiGate remembers authenticated sessions using browser cookies.