In PTN's L3 MCC network planning, MCC vlan must be unique throughout the network.（

A.A MCC monitoring vlan and IP on all devices throughout the network can be exported to a file for backup.

B.A PTN device on which mcc vlan and ip have problems can use service encapsulation ip to log into another PTN device remotely in the network.

C.Service encapsulation vlan and ip will not be added into packet header when service packets are being forwarded in PTN network.

D.T31 system does not support creation of vlan with 3001 or above.

A.MCC-VLAN规划

B.设备业务单板IP地址分配

C.MCC 端口IP地址规划

D.网元IP地址规划

A.MCC-VLAN规划

B.设备业务单板IP地址分配

C.MCC 端口IP地址规划

D.网元IP地址规划

A.核心层的L2/L3 PTN与L3 PTN间

B.主备L2/L3 PTN设备间

C.不同的L2/L3 PTN汇聚节点对之间

D.核心层的L3 PTN间

A.核心层、汇聚层和接入层采用L3 PTN

B.核心层、汇聚层采用L3 PTN，接入层采用L2 PTN

C.核心层采用L3 PTN,汇聚层和接入层采用L2 PTN

D.核心层、汇聚层和接入层采用路由器

A.核心层的L2/L3 PTN与L3 PTN间

B.主设备L2/L3PTN设备间

C.不同的L2/L3PHM 节点对之间

D.核心层的L3 PTN间