A.Communication power supplyB.dispatching communicationC.Access networkD.Communication line
A.終端B.網(wǎng)關(guān)C.網(wǎng)守D.域名服務(wù)器
A.數(shù)字配線架B.語音配線架C.光纖配線架D.網(wǎng)絡(luò)配線架