H31-311_V2.5 무료 덤프문제 온라인 액세스

Which of the following methods can be used to multiplex low-order ODUk into high-order ODUk?

• A.Wavelength Division Multiplexing
• B.Time Division Multiplexing
• C.Space Division Multiplexing
• D.Frequency Division Multiplexing

The optical monitoring channel is established for monitoring the WDM optical transmission system.
ITU-T recommends using a wavelength of 1510nm and a capacity of 2MHz/s.

• A.True
• B.False

Unified line type single board supports mixed transmission of OTN, SDH and packet services, and also supports the transmission of one of the services.

• A.True
• B.False

Compared with PDH, the main advantages of SDH are reflected in which of the following aspects?
(Multiple choice)

• A.High frequency band utilization
• B.Interface Specification
• C.Synchronous multiplexing
• D.Strong compatibility
• E.Operation and maintenance

The standard Ethernet frame length should not be less than 64 bytes. Which of the following factors will lead to this limitation? (Multiple choice)