Study tips 642-457

Which statement about the function of a gatekeeper is true?

which VoIP protocol does a gatekeeper provide address translation and control access?

Which CAC configuration on a gatekeeper restricts to 10 G.711 audio calls?

Which action configures AAR to route the calls that have been rejected by the gatekeeper CAC through the PSTN?

What is a prerequisite of AAR deployment?

what will the system consider the phone to be?

Which two Cisco Extension Mobility attributes are available in the user device profile?

Which set of implementations would best address the overlapping directory number extensions for intersite (WAN) calling between the HQ site and the BR site?

What is the difference between an H.323 gateway and a SIP gateway?

What is the difference between an MGCP gateway and a SIP gateway?