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I had to use Powerline adapters in my apartment and was skeptical because of early problems. I have been very impressed. I've had no problems. Although I don't understand why the manufacturers put 100 Mbps Ethernet on 500 Mbps adapters. Probably because 500 Mbps real world performance is closer to 100 Mbps.

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That's the capacity of the entire network,so if you had multiple adapters data between them might travel at 500Mbps even if each individual computer is capped at 100Mbps.

Its the maximum physical rate of the mains interface, but in reality they won't achieve close to that rate unless they are welded to each other in an anechoic chamber with a noiseless sine wave supply.

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