What is a Single Fiber SFP, and how does it work?

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Single Fiber SFP (Small Form-Factor Pluggable) module is a type of optical transceiver that transmits and receives data over a single strand of optical fiber instead of using a pair of fibers (one for transmission and one for reception). It operates using Wavelength Division Multiplexing (WDM) technology, where two different wavelengths are used—one for transmitting (Tx) and another for receiving (Rx).