NEW QUESTION 48
An arrayed waveguide grating (AWG) multiplexer/demultiplexer has the following advantages: short wavelength spacing, large number of channels, and flat passband. It suits DWDM systems with ultra-high speed and large capacity.

NEW QUESTION 49
MAC loopback and PHY loopback are used for fault locating. When the MAC loopback is set to an inloop, you can set the PHY loopback according to the actual situation.

NEW QUESTION 50
In the case of 1+1 linear MSP, which of the following switching modes do not require the enabling of the APS protection protocol? (Multiple Choice)

NEW QUESTION 51
Which of the following clock working modes support the ITU-T G.781 standard? (Multiple Choice)

NEW QUESTION 52
Which of the following is not the northbound interface provided by the U2000?

NEW QUESTION 53
In the frame structure of SDH signals, there are abundant overhead bytes used for operation, administration, and maintenance (OAM). The overhead bytes account for ( ) of all bits in the entire frame and greatly enhance the monitoring functions of the network.

NEW QUESTION 54
The error correction capability of FEC is measured with the encoding gain. Which of the following statements about the encoding gain is incorrect?

NEW QUESTION 55
Which of the following is the frame whose VC-4 J1 byte is indicated by the current frame’s AU pointer?

NEW QUESTION 56
The SL64 board can be used in an OSN 2500.

NEW QUESTION 57
OTM nr.m consists of a maximum of “n” optical multiplexing channels and does not support non-channel-associated overheads. The letter “r” indicates function reduction.

NEW QUESTION 58
Which of the following is the frame structure of STM-16?

NEW QUESTION 59
Which of the following operating systems support the installation of the U2000 client?

NEW QUESTION 60
Which of the following are different types of ESCs divided by implementation principles?

NEW QUESTION 61
When a bridge uses the IVL learning mode, the entry in the MAC address table is created according to the source MAC address and source port of the data frame. This entry is valid for all VLANs.

NEW QUESTION 62
A two-fiber ring topology consisting of three NEs is arranged in the counterclockwise sequence as A, B, and C.
Services between A and C occupy the 48th VC-12 timeslot in the first VC-4 on the short path, and services between B and C also occupy the 48th VC-12 timeslot in the first VC-4 on the short path. In this case, which of the following is the subnet type of the ring protection?

NEW QUESTION 63
Which of the following statements about OTN advantages is incorrect?

NEW QUESTION 64
When bit errors are detected in the B2 byte, which of the following alarms is reported by the peer end?