Which party has a SIP B2BUA role in the call?

Refer to the exhibit.

Which party has a SIP B2BUA role in the call?
A . 172.17.4.100
B . 10.100.4.65 and 172.17.4.100
C . 10.100.4.65
D . None of the parties has a B2BUA role in the call.
E . 10.100.4.68 and 10.100.4.65

View Answer

Answer: C