Question 404:
Which two header fields does a SIP Agent Server use to indicate that the message needs Provisional Response Acknowledgment? (Choose two.)
Answer options:
A. RAck: [Numeric value that uniquely identifies the response message] B. Require: 100rel C. Allow-Events: 100rel D. CSeq: [Numeric value that uniquely identifies the response message] E. RSeq: [Numeric value that uniquely identifies the response message] F. Allow: 100rel AB