Multiple Choice
Which involves a user agent client, one or more proxy servers that determine which VoIP services are available from other servers or network devices, and one or more redirect servers that enable the user agent, which initiates a call, to determine the IP address of the destination user agent?
A) ITU E.164
B) ITU H.323
C) SIP
D) MGCP
Correct Answer:

Verified
Correct Answer:
Verified
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