Cisco is making every effort to ensure that the gateways, applications, and client produced integrate and operate seamlessly with third party products. From the list below, select which protocols are being used to ensure this effort.

A.
H.323

B.
Session Initiation Protocol (SIP)

C.
Media Gateway Control Protocol (MGCP)

D.
Simple Gateway Control Protocol (SGCP)

E.
All choices are correct.