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Land-originated Call
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Which statement describes the distributed call control model in VoIP networks？（）A、The gateway voice-capable device is configured to support call control directly performing call setup， call maintenance， and call teardownB、The gateway voice-capable device has a local call routing table configured through a routing protocol.C、The gateway voice-capable device relies on a call agent to support call control.D、The gateway voice-capable device relies on a gatekeeper to support call setup， call maintenance， and call teardown.
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单选题Which sequence of messages demonstrates the communications between the LAC and LNS when theyestablish an L2TP session?（）A
Incoming Call Reply, Incoming Call Request, Incoming Call ConnectedB
Incoming Call Reply, Incoming Call Connected, Incoming Call RequestC
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Incoming Call Request, Incoming Call Connected, Incoming Call Reply
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单选题Which statement describes the distributed call control model in VoIP networks？（）A
The gateway voice-capable device is configured to support call control directly performing call setup， call maintenance， and call teardownB
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单选题The Acme company has determined that during its busiest hours， the average number of internal VoIP calls across the WAN link is four （4）. Since this is an average， the WAN link has been sized for six （6） calls with no call admission control. What will happen when a seventh call is attempted across the WAN link？ （）A
the seventh call is routed via the PSTNB
the call is denied and the original six （6） calls remainC
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