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What does "full-duplex data transfers" mean?

Data transfer is full duplex if it can handle data flowing in both directions (upload and download, for instance) simultaneously. A half duplex connection can only send data in one direction at a time. Think of a walkie-talkie, where you can only hear the other person as long as you're not transmitting, yourself.

 

Because the SuperSpeed bus uses two differential pairs to transfer data, it can transfer in both directions at the same time, making it full duplex, unlike USB 2.0.

 

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