When configuring LMSP, there are two switching modes: single turbulent cutting and inserting and double full switching. Single-ended switching does not require self-use protection

Which of the following descriptions about routing loops is wrong?

In the current network, which of the following is the most commonly used VLAN division method?

Which of the following is the electrical layer overhead of OTN?

When it is found that the local end reports the ETH_LOS alarm, the fault can be located by the switch-back method. If the alarm disappears after the ODF loops back to the local end, which of the following may be the cause?