Which configuration step (if any) is necessary to enable FTP inspection on TCP port 2121?
A.
None. FTP inspection is enabled by default using the global policy.
B.
Create a new class map to match TCP port 2121, then edit the global policy to inspect FTP for traffic matched by the new class map.
C.
Edit default-inspection-traffic to match FTP on port 2121.
D.
Add a new traffic class using the match protocol FTP option within the inspect_default class map.