Q8
Single choice
In this scenario, the User Agents (UAs) are both SIP-enabled phones. What is the correct order of this
basic SIP message flow?
1. The UAC initiates the session with an INVITE. 2)The UAS sends a 200 OK message indicating that the request has succeeded. 3)Media is exchanged bidirectionally. 4)The UAS sends a 100 Trying response back to the UAC 5)The UAC sends a BYE message. This is followed by a 200 OK final response message sent by the UAS. 6)The UAS sends a 180 Ringing message. 7)The UAC sends an ACK message confirming that it has received a final response to INVITE.