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 . The initial REGISTER request does not contain authentication details.
B . The initial REGISTER request is rejected only if the user provided the wrong security code/password.
C . It must confirm the reliable delivery of this initial REGISTER request
D . System manager needs time to look-up the Communication Address in its database.

View Answer

Answer: A