Exhibit:

A network is being designed for IP videoconferencing using IP-to-IP gateways and gatekeepers. In order for a call to successfully complete from a prefix 408 number to a prefix 919 number, on which device must the following command be implemented?

zone local GK408 usa 10.16.8.123

A.
GK408

B.
viaGK

C.
GK919

D.
GW408

E.
IPIPGW

F.
GW919