300-070 Question #42: Real Exam Question with Answer & Explanation

The correct answer is A: H.323. CUCM can actively monitor the registration and operational status of MGCP, SCCP, and SIP gateways because these protocols include explicit registration or keepalive mechanisms that report device state back to CUCM. H.323, however, does not use a persistent registration model with

Question

Which protocol can Cisco Unified Communications Manager not use to monitor the status of the gateway?

Options

AH.323
BSIP
CMGCP
DSCCP

Explanation

CUCM can actively monitor the registration and operational status of MGCP, SCCP, and SIP gateways because these protocols include explicit registration or keepalive mechanisms that report device state back to CUCM. H.323, however, does not use a persistent registration model with CUCM in the same way - H.323 gateways initiate outbound calls to CUCM but do not maintain a monitored registration state. As a result, CUCM has no built-in mechanism to determine whether an H.323 gateway is online, offline, or in a fault condition, making H.323 the answer.

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