Which two parameters must be configured for your application to work properly?

You have a VoIP application that requires external sessions to be initiated into your environment. Your network only has a single public IP address configured on the egress interface.

Which two parameters must be configured for your application to work properly? (Choose two)

A.
port-oversubscription off

B.
persistent-nat

C.
overflow-pool interface

D.
port-overloading off