Third-generation optical modules and semiconductor components supporting 28Gbit/s interfaces have made 100G more attractive than 10G or 40G and open the door to 400G connectivity. QSFP28 and CFP4 modules support 100G ports at much higher densities, lower power and lower cost of ownership than previous generations. There are already 20 vendors developing or shipping these optical modules, including all the market leaders and several new entrants. This will lead to significant competition and downward pressure on pricing.
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