A.they run a spell check on host names to ensure accurate routing
B.they map individual hosts to their specific IP address
C.they convert domain names into IP address
D.Given an IP address,they determine the name of the host that is…
A.單站部署
B.集中與遠(yuǎn)程分支呼叫處理
C.分布式呼叫處理部署
D.通過IP WAN 的組群