Dense Wavelength Division Multiplexing (DWDM) is an important innovation in optical networks.Which two descriptions best define DWDM?()
A . optical technology for transmitting up to 32 channels over multiple fiber strands
B . optical technology for transmitting up to 16 channels over multiple fiber strands
C . a WDM system that is compatible with EDFA technology
D . a technology for transmitting more closely packed optical signals using more sophisticated transceiver designs than CWDM .
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是
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是
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