Which two header fields does a SIP Agent Server use to indicate that the message needs Provisional Response Acknowledgment? (Choose two.)
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
Which two header fields does a SIP Agent Server use to indicate that the message needs Provisional Response Acknowledgme
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Which two header fields does a SIP Agent Server use to indicate that the message needs Provisional Response Acknowledgme
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