A.628戶 B.528戶 C.688戶 D.588戶
A.2.1 B.2.4 C.2.3 D.2.2
A.大客戶業(yè)務(wù)VLAN B.以太網(wǎng)業(yè)務(wù)VLAN C.1588協(xié)議報文VLAN D.DCN監(jiān)控VLAN