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bout encapsulation vlan and IP on ZTE's PTN devices, which of the following is cor

rect?()

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.

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