Question 196
Ethernet dedicated line service is a point-to-point service form in topology, and is mainly used to realize point-to-point transmission of Ethernet services.
Question 197
The TAG attribute cannot be set for the internal port VCTRUNK of the board on the NMS.
Question 198
Mandatory switching. Fiber switching manual switching and motion switching are in descending order of priority.
Question 199
Which of the following alarms will not be generated for the alarm?
Question 200
The essence of QPSK modulation is to select 4 possible values on the optical field phase, so that the baud rate can be reduced by half without reducing the line rate.