When setting up the registration-caching parameter to enabled in the sip-interface configuration element, _____________.
- A.the Session Border Controller will never use the SIP-NAT mechanism for routing
- B.the Session Border Controller will not use the registration cache for routing
- C.all endpoints in the realm will be cached when registered
- D.only endpoints behind NAT in the realm will be cached when registered
- E.the Session Border Controller will never use the local-policy mechanism for routing