Which one of the following is not necessary to establish a GE-level service path on the network management?
Which of the following statements is incorrect about the optical layer interfaces OTM-nm and OTM-nrm of OTN?
NE1 and NE2 are the intersection nodes of the SNCP ring and the SNCP ring, so how many SNCP protection groups and how many unidirectional cross-connects need to be configured on NE1.
Which of the following is correct?