which feature allow from dynamic NAT pool to choose next IP address and not a port on a used IP address?

which feature allow from dynamic NAT pool to choose next IP address and not a port on a used IP address?
A . next IP
B . round robin
C . Dynamic rotation
D . Dynamic PAT rotation

View Answer

Answer: B

Explanation:

The round-robin keyword enables round-robin address allocation for a PAT pool. Without round robin, by default all ports for a PAT address will be allocated before the next PAT address is used. The round-robin method assigns an address/port from each PAT address in the pool before returning to use the first address again, and then the second address, and so on.

Source: http://www.cisco.com/c/en/us/td/docs/security/asa/asa90/configuration/guide/asa_90_cli_config/ nat_objects.html#61711