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USB Hubs are hubs with varying types of port connections that expand the length and number of USB connections when the standard one-to-one device connection is not sufficient. We'll explain a number of scenarios in which one or more USB connections would be required, and examine the environments where they would be used. You'll also learn about USB expansion card, see how they look and are configured and when it would be appropriate to use this connection extension as opposed to using a USB hub.