Which of the following descriptions about the characteristics of optical fibers are correct? (Multiple choice)

• A.G654 optical fiber is mainly used in submarine optical fiber communication that requires a long regenerative distance
• B.G653 fiber is called dispersion-unshifted fiber or the best performance fiber at 1550 nm
• C.G655 fiber is a non-zero dispersion-shifted single-mode fiber, suitable for DWDM system applications
• D.G652 fiber is the single-mode fiber with the best performance at 1310 nm

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PWE3 is a processing mechanism that simulates the key attributes of a certain service and transmits it end-to-end on the PSN network through a tunnel (IP/MPLS).

• A.False
• B.True

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The path at the GE level is essentially a path at the Client level.

• A.True
• B.False

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Regarding the following three types of ODUk SNCP protection, which of the following types cannot be configured in the scenario where the working or protection path of the service is carried by two or more channels?

• A.SNC /N
• B.SNC/S
• C.SNC/S and SNC/N
• D.SNC/I

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For 100G (112Gbit/s) signal, the actual data baud rate is only 28G baud.

• A.True
• B.False

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