128 GlossaryTCP/IP — Transmission Control Protocol/Internet Protocol.termination — Some devices (such as the last device at each end of a SCSI cable)must be terminated to prevent reflections and spurious signals in the cable. Whensuch devices are connected in a series, you may need to enable or disable thetermination on these devices by changing jumper or switch settings on the devices orby changing settings in the configuration software for the devices.TOE — TCP/IP offload engine.U-DIMM — An unregistered (unbuffered) DDR3 memory module.uplink port — A port on a network hub or switch used to connect to other hubs orswitches without requiring a crossover cable.UPS — Uninterruptible power supply. A battery-powered unit that automaticallysupplies power to your system in the event of an electrical failure.USB — Universal Serial Bus. A USB connector provides a single connection point formultiple USB-compliant devices, such as mice and keyboards. USB devices can beconnected and disconnected while the system is running.USB memory key — See memory key.utility — A program used to manage system resources—memory, disk drives, orprinters, for example.V — Volt(s).VAC — Volt(s) alternating current.VDC — Volt(s) direct current.VGA — Video graphics array. VGA and SVGA are video standards for video adapterswith greater resolution and color display capabilities than previous standards.video adapter — The logical circuitry that provides (in combination with the monitor)your system’s video capabilities. A video adapter may be integrated into the systemboard or may be an expansion card that plugs into an expansion slot.video memory — Most VGA and SVGA video adapters include memory chips inaddition to your system’s RAM. The amount of video memory installed primarilyinfluences the number of colors that a program can display (with the appropriate videodrivers and monitor capabilities).video resolution — Video resolution (800 x 600, for example) is expressed as thenumber of pixels across by the number of pixels up and down. To display a program ata specific graphics resolution, you must install the appropriate video drivers and yourmonitor must support the resolution.
