As a YourDomain instructor you are required to select the valid statement regarding Cisco IP telephony components.

A.
Voice applications includes hardware and software that provides standard telephone call processing services.

B.
Voice applications includes voice gateways, switches, and routers.

C.
Voice applications includes network-based software elements that enable advanced IP telephone functions.

D.
Voice applications includes IP telephones that serve as end-user devices for the network.