| A | B |
|---|
| expanding | Adding components, such as a printer or scanner, that increase functionality |
| upgrading | means replacing a component, such as a microprocessor, with one that is new and that provides enhanced performance |
| CPU socket | what a microprocessor plugs into (located on a computer's system board) |
| DRAM | memory modules typicall found in today's PCs |
| peripheral devices | the input, output, and storage devices designed to connect to a computer |
| USB | universal serial bus |
| USB hub | an inexpensive device that turns one USB port into multiple ports |
| bus-powered hub | a hub that draws all its power from the computer |
| self-powered hub | a hub that plugs into an external power supply |
| wireless USB | operates by transmitting data from a wireless transceiver in your computer to a similar transceiver on a Wireless USB device |
| port | where the expansion bus leads to a connection point that can be accessed outside the system unit |
| expansion slot | provides a connection point for internal devices, such as memory, graphics cards, internal modems, and add-on ports |
| expansion card | contains circuitry for a device such as a modem, network card, or graphics card |
