In one custom dynamic application, the inside client connects to an outside server using TCP port 4444 and negotiates return client traffic in the port range of 5000
to 5500. The server then starts streaming UDP data to the client on the negotiated port in the specified range. Which Cisco ASA feature or command supports this
custom dynamic application?

A.
TCP normalizer

B.
TCP intercept

C.
ip verify command

D.
established command

E.
tcp-map and tcp-options commands

F.
set connection advanced-options command

Explanation:
http://www.cisco.com/en/US/docs/security/asa/asa72/configuration/guide/int5505.html
Established command–This command allows return connections from a lower security host to a higher security host if there is already an established connection
from the higher level host to the lower level host.
For same security interfaces, you can configure established commands for both directions.