For Huawei equipment, NODE ID is the unique identifier of the intelligent network element in the control plane. After the network is configured with intelligent services, the NODE ID will no longer be modified during construction.

Which of the following layers define the protocols that control the network layer? The protocols at this layer apply to logical links, that is, end-to-end connections between two devices.

The Raman amplifer uses which of the following effects?

The packet service board can perform L3 layer processing on the accessed large network services.

Which of the following statements about OTM-nm and OTM-nr.m, the optical layer interfaces of OTN are wrong?