Which statement is true regarding SCCP?

Which statement is true regarding SCCP?

A.
SCCP supports the widest range of features on Cisco IP phones.

B.
SCCP requires a registrar server.

C.
The protocol is proprietary to Cisco.

D.
Only the IP address is required for the gateway to communicate with Cisco Unified
Communications Manager.

E.
A PRI backhaul connection forwards PRI Layer 3 (Q.931) signaling information via a TCP
connection from the gateway to the call agent.