Which of the following descriptions about the requirements for fiber optic deployment is wrong?

• A.The connecting parts such as bare boards and flanges must be connected reliably
• B.Connection points should be clean
• C.There should be no forced pulling and unnatural bending of the optical fiber layout, and no other cables and objects are pressed on it after deployment
• D.Labels at both ends of the fiber are filled in correctly and clearly, in neat positions, and in the same direction
• E.The optical fiber is not free to twitch in the buckle

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How many 64K services can a 2M bandwidth support at most?

• A.30
• B.31
• C.63
• D.32

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The optical signal of () is multiplexed into the same optical fiber for transmission. We call it Wavelength Division Multiplexing in this way.

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The basic principle of fault location is to accurately locate the fault to a single station or even a single board.

• A.True
• B.False

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Which of the following description of the contents of the calculation formula of the maximum line rate frame rate (N=Ratc/((L+7+1+M)x8)) is wrong?

• A.The "8" outside the brackets means that 1 Byte contains 8 Bits
• B.M is the frame gap, the minimum IFG (minimum frame gap) is 8Bytes
• C.L is the standard Ethernet frame length, the minimum value is 64Bytes
• D.Rate indicates the line rate of the physical layer, if the device port is FE, then Rate=100Mbit/s

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