What is the initial REGISTER request from a SIP endpoint rejected by Avaya Aura® Session Manager (SM)?

What is the initial REGISTER request from a SIP endpoint rejected by Avaya Aura® Session Manager (SM)?
A . because SM needs time to look-up the Communication Address in its database
B . because it must confirm the reliable delivery of this initial REGISTER request
C . because the initial REGISTER request is rejected only if the user provided the wrong security code/password
D . because the initial REGISTER request does not contain authentication details

View Answer

Answer: C