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The OSN 7500 supports a maximum of 2M service boards. Which of the following is correct.
The OSN 7500 supports a maximum of 2M service boards. Which of the following is correct.A . 1 B.2 C.3 D.4View AnswerAnswer: D.
The levels of forced switching, fiber cut switching, manual switching, and practice switching are arranged from high to low.
The levels of forced switching, fiber cut switching, manual switching, and practice switching are arranged from high to low.A . True B. FalseView AnswerAnswer: A
What are the differences between the AU pointer and the TU pointer? (Multiple choice)
What are the differences between the AU pointer and the TU pointer? (Multiple choice)A . The scope of the instruction is different B. The number of bits occupied by the pointer value is different C. The bytes stored in the pointer value are different D. The unit of adjustment is...
Which of the following options are in the low-loss area of single-mode fiber? (Multiple choice)
Which of the following options are in the low-loss area of single-mode fiber? (Multiple choice)A . 1310nm _ B. 900nm C.1550nm D.1200nmView AnswerAnswer: AC
Which of the following elements does a data communication network have in terms of equipment? (Multiple choice)
Which of the following elements does a data communication network have in terms of equipment? (Multiple choice)A . Terminal equipment B. Transmission system C. Switching devices D. Core equipmentView AnswerAnswer: ABC
When inserting LCK to the ODUk signal at the local end, what processing will the downstream station system not perform?
When inserting LCK to the ODUk signal at the local end, what processing will the downstream station system not perform?A . Report ODUk_PM_LCK alarm B. Download ODUk_AIS information C. Return ODUk_PM_BDI D. Insert ODUk_PM_LCK alarmView AnswerAnswer: D.
The LDG supports electrical layer scheduling at the ODU1 level.
The LDG supports electrical layer scheduling at the ODU1 level.A . True B. FalseView AnswerAnswer: B
The advantages of WDM mainly include the following. (Multiple choice)
The advantages of WDM mainly include the following. (Multiple choice)A . Large capacity, " transparent" transmission of data B. The system is easy to upgrade, and the existing investment can be protected to the greatest extent when upgrading C. Can fully replace SDH equipment D. Compatible with future all-optical switching...
All bytes in the SDH frame structure will be scrambled.
All bytes in the SDH frame structure will be scrambled.A . True B. FalseView AnswerAnswer: B
The half-duplex mode must have a collision detection and avoidance mechanism to avoid the situation where multiple devices seize the line at the same time. This mechanism is the so-called CSMA/CD, and the Chinese name is carrier sense multiple access/collision detection .
The half-duplex mode must have a collision detection and avoidance mechanism to avoid the situation where multiple devices seize the line at the same time. This mechanism is the so-called CSMA/CD, and the Chinese name is carrier sense multiple access/collision detection .A . True B. FalseView AnswerAnswer: A
