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單項(xiàng)選擇題

What type of services are provided by the Cisco IOS gateways in a VoIP network with Cisco CallManger functionality?()

A.Cisco IOS gateways provide services such as address translation and network access control for the devices on the network
B.Cisco IOS gateways provide services such as bandwidth management and accounting
C.Cisco IOS gateways provide media termination and signal translation between the public switched telephone network (PSTN) and IP networks
D.Cisco IOS gateways provide zone management for all registered endpoints in the network

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