There are several types of USB connectors out there, including some that have been added while the specification progressed. The original USB specification features Standard-A and Standard-B plugs and receptacles; the B connector was necessary so that cabling could be plug ended at both ends and still prevent users from connecting one computer receptacle to another.
 
The data connectors in the Standard-A plug are actually rested in the plug as compared to the outside power connectors. This per...

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