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It is known that the GE optical interface technical indicators of a certain PTN equipment are as follows: average transmit optical power (dBm): -5~0, receive sensitivity (dBm): -23, minimum overload point (dBm): -3, minimum extinction ratio (dB): 9. For this optical interface, which of the following optical powers (dBm) is the most suitable received optical power?
It is known that the GE optical interface technical indicators of a certain PTN equipment are as follows: average transmit optical power (dBm): -5~0, receive sensitivity (dBm): -23, minimum overload point (dBm): -3, minimum extinction ratio (dB): 9. For this optical interface, which of the following optical powers (dBm) is...
There is a lower limit to the length of an Ethernet frame. What is the main reason for this?
There is a lower limit to the length of an Ethernet frame. What is the main reason for this?A . Carrier sense B. Multi-point access C. Conflict detection D. Improve network bandwidth utilizationView AnswerAnswer: C
The ETH_LOS or LINK_ERR alarm occurs on a single Ethernet port of a multi-interface Ethernet board, and the service is interrupted. The possible reasons are: the working mode of the Ethernet port does not match or the interface rate is inconsistent, and the hardware failure of the optical module. Which of the following is also possible?
The ETH_LOS or LINK_ERR alarm occurs on a single Ethernet port of a multi-interface Ethernet board, and the service is interrupted. The possible reasons are: the working mode of the Ethernet port does not match or the interface rate is inconsistent, and the hardware failure of the optical module. Which...
Which of the following are commonly used test instruments for WDM system include? (Multiple choice)
Which of the following are commonly used test instruments for WDM system include? (Multiple choice)A . Optical power meter B. Optical Spectrum Analyzer C. Optical Time Domain Reflectometer D. Data Service Tester E. 2M BER tester F. MultimeterView AnswerAnswer: ABCDF
The SYNLOCK V3 device can achieve different clock accuracy levels through different board configurations. Which of the following can be realized by SYNLOCK V3? (Multiple choice)
The SYNLOCK V3 device can achieve different clock accuracy levels through different board configurations. Which of the following can be realized by SYNLOCK V3? (Multiple choice)A . SEC B. LPR C. TNC D. LNCView AnswerAnswer: BCD
During the network acceptance test, it is found that the OSN 3500 can work normally when the external clock source is connected, and enters the hold state when the external clock source is disconnected, but the hold state cannot last for 24 hours. Which of the following are possible reasons?
During the network acceptance test, it is found that the OSN 3500 can work normally when the external clock source is connected, and enters the hold state when the external clock source is disconnected, but the hold state cannot last for 24 hours. Which of the following are possible reasons?A...
In the C-band 80-wave system, add the operation of C-band odd-numbered waves. Which of the following description is correct? (Multiple choice)
In the C-band 80-wave system, add the operation of C-band odd-numbered waves. Which of the following description is correct? (Multiple choice)A . It is necessary to re-adjust the optical emission power B. After the operation, the signal-to-noise ratio of the original service remains unchanged C. The operation process will interrupt...
The LPT (Link Pass Through) function is applied to the scenario where WDM equipment accesses FE/GE/10GE LAN services. Which statement about LPT is correct? (Multiple choice)
The LPT (Link Pass Through) function is applied to the scenario where WDM equipment accesses FE/GE/10GE LAN services. Which statement about LPT is correct? (Multiple choice)A . It makes the user equipment perceive the link status information by turning off and on the laser of the WDM device, thereby triggering...
The IP address you use is 165.247.52.119, the subnet mask is 255.255.240.0, which subnet is your host on?
The IP address you use is 165.247.52.119, the subnet mask is 255.255.240.0, which subnet is your host on?A . 165.247.52.0 B. 165.247.32.0 C.165.247.56.0 D. 165.247.48.0View AnswerAnswer: D
When the Ethernet networking is applied, which of the following characteristics can adjust the bandwidth as needed, and dynamically increase or decrease the members in the VCTRUNK without affecting the business? When a member of the virtual concatenation group fails, the bandwidth can be quickly adjusted to ensure the normal transmission of data; when the failed member recovers, the original bandwidth of the virtual concatenation group is automatically restored.
When the Ethernet networking is applied, which of the following characteristics can adjust the bandwidth as needed, and dynamically increase or decrease the members in the VCTRUNK without affecting the business? When a member of the virtual concatenation group fails, the bandwidth can be quickly adjusted to ensure the normal...
