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Question 1:

When the transmit end detects that the b6-b8 of the K2 byte is 110, it indicates that the () alarm is reported at the transmit end.

A. MS-AIS

B. R-LOS

C. R-LOF

D. MS-RDI

Correct Answer: ABC


Question 2:

Which of the following is not a condition for triggering multiplex section protection (MSP)?

A. The MS-AIS signal is detected.

B. AU-AIS is detected.

C. R-LOS is detected.

D. R-LOF is detected.

Correct Answer: B


Question 3:

Which of the following can be the center wavelengths of the pump sources in an EDFA? (Multiple Choice)

A. 980 nm

B. 1510 nm

C. 1480 nm

D. 1310 nm

Correct Answer: AC


Question 4:

Which of the following is the meaning of SFD in the Ethernet frame structure?

A. Preamble

B. Frame check sequence

C. Start frame delimiter

D. Payload

Correct Answer: C


Question 5:

Only one TCM can be used at a site.

A. TRUE

B. FALSE

Correct Answer: B


Question 6:

When setting the LCAS mode, follow the following principles:

1.

If devices at the two ends are both Huawei devices, set them to the “Standard Mode”.

2.

If a Huawei device is interconnected with a third-party device, set the interconnected devices to the same mode according to the mode supported by the third-party device.

A. TRUE

B. FALSE

Correct Answer: B


Question 7:

Which of the following is the frame structure of STM-16?

A. 9*270*1

B. 9*270*4

C. 9*270*16

D. 9*270*64

Correct Answer: C


Question 8:

Compared with a dense wavelength division multiplexing (DWDM) system, a coarse wavelength division multiplexing (CWDM) system provides a certain number of wavelengths and a transmission distance within ( ) km, which greatly reduces system cost and has strong flexibility.

A. 50

B. 100

C. 200

D. 20

Correct Answer: B


Question 9:

SES: There are 5% or more than 5% bit error blocks or at least one defect (OCI/AIS/LCKAAE/LTCA1M/PLM) within one second.

A. TRUE

B. FALSE

Correct Answer: B


Question 10:

Which of the following is the multiplexing mode of SDH?

A. Flexible mapping

B. Asynchronous multiplexing

C. Flexible mapping and asynchronous multiplexing

D. Flexible mapping and synchronous multiplexing

Correct Answer: D


Question 11:

Which of the following statements about the optical-layer interfaces OTM-n.m and OTM-nr.m of OTN is incorrect?

A. n indicates the number of wavelengths carried by the maximum capacity.

B. m indicates the rate. The value can be 1, 2, or 3.

C. r indicates OTM without the OSC function.

D. OTM-nr.m with OSC signals is OTM-n.m.

Correct Answer: B


Question 12:

The 1310 nm and 1550 nm transmission windows are low-loss windows. In DWDM systems, only the 1550 nm transmission window is used. Which of the following is the major cause?

A. The working wavelength flatness area of the EDFA is included in this window.

B. The non-linear effect of the 1550 nm wavelength area is small.

C. The 1550 nm wavelength area is applicable to long-haul transmission.

D. None of the above

Correct Answer: A


Question 13:

Which of the following can be configured as the monitoring time of NE performance events?

A. Later than the current time

B. Same as the current time of the NE

C. Earlier than the current time

D. Any time

Correct Answer: A


Question 14:

OChr means that the electrical supervisory technology is used.

A. TRUE

B. FALSE

Correct Answer: A


Question 15:

When a fiber cut test is performed on a normal MSP ring, which of the following alarms is reported? (Multiple Choice)

A. TU-AIS

B. R-LOS

C. APSJNDI

D. BD STATUS

Correct Answer: BC