Which statement about the function of a gatekeeper is true?
A.
A gatekeeper improves call routing between servers within a single Cisco Unified Communications
Manager cluster.
B.
A gatekeeper can replace the dial plan of a Cisco Unified Communications Manager cluster.
C.
A gatekeeper can simplify the dial plan between many different Cisco Unified Communications
Manager clusters.
D.
Gatekeepers can be implemented to deploy RSVP-based CAC.