Which message is used by a Cisco Unified Communications Manager respond to periodic keepalives from a Cisco IOS MGCP gateway?
Click on the arrows to vote for the correct answerA. B. C. D. E.
(2xx) Successful completion: The requested transaction was executed normally.
The correct answer is "C. NTFY."
When a Cisco IOS MGCP gateway establishes a connection with a Cisco Unified Communications Manager (CUCM), it sends periodic keepalive messages to ensure the connection is still active. In response, CUCM sends a notification message (NTFY) to the MGCP gateway to acknowledge receipt of the keepalive and to indicate that the connection is still active.
The NTFY message is part of the MGCP protocol, which is used to control media gateways in a VoIP network. The NTFY message is sent by the Call Agent (CUCM) to the Media Gateway Controller (MGC) ( Cisco IOS MGCP Gateway) to notify it of a change in call state, such as an on-hook or off-hook event, or to acknowledge receipt of a keepalive message.
The other options listed are not correct:
Therefore, the correct answer is NTFY.