From the course: CompTIA A+ Core 1 (220-1101) Cert Prep

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Understanding USB

Understanding USB

From the course: CompTIA A+ Core 1 (220-1101) Cert Prep

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Understanding USB

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- For most of us, our experience with USB is simply grabbing some kind of USB device, plugging it into something and it just works. That's fantastic. But in this episode, I want to drill down a little bit, so we can really understand how USB works. So to get started, let's consider for a moment this USB mouse. Very simple mouse, nothing fancy here. It's got a USB A connector on the end. But when I plug this in, I'm plugging it into, for example, a system that has a motherboard with a built-in, you ready? USB controller. What's taking place is, built into my motherboard is almost like a little network from which we connect all these different USB devices and built into the motherboard itself is this controller, that simply makes all this other stuff work. So when we're talking about USB, we get into this concept of what I call upstream and downstream. Let me show you. So this is the back of some system here. I'm…

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