This article explores some practical problems and difficulties in the application of high-speed transceiver in the data center. For example, the 40G / 100G high-speed transceiver has not developed a revolutionary new photoelectric conversion technology, but by upgrading the manufacturing process, the original 10G transceiver technology to expand. In essence, for the 10G transceiver, by increasing the number of transceiver fiber to enhance the bandwidth. 

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