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Refer to the exhibit. Which user agent has the recipient role in this SIP REFER call transfer?

Posted: Sat Jul 23, 2022 6:59 pm
by answerhappygod
Refer to the exhibit.

Which user agent has the recipient role in this SIP REFER call transfer?
Refer To The Ex 1
Refer To The Ex 1 (71.09 KiB) Viewed 52 times
A. user agent A
B. user agent B
C. user agent C
D. user agent B and C
E. user agent A and B