What is true about H.323 endpoint call setup? PrometricVUE.com

A.
Endpoints always do their own call setup.

B.
Endpoints require a gatekeeper to do call setup.

C.
Endpoints can either do their own setup or be assisted by a gatekeeper.

D.
Endpoints require a proxy server to do call setup.

Explanation:

A gatekeeper is an H.323 entity on the network that provides services such as address translation and network access control for H.323 terminals, gateways, andMCUs. Also, they can provide other services such as bandwidth management, accounting, and dial plans that can be centralized to provide salability.
Gatekeepers are logically separated from H.323 endpoints such as terminals and gateways. They are optional in an H.323 network, but if a gatekeeper is present, endpoints must use the services provided.