In Windows XP, click the Modems tab. In Windows 98 or XP, select the modem, and then

Glossary ISOOSI International Organization for StandardizationOpen Systems Interconnect The ISOOSI model is a set of standards that define network functionality. ISOOSI sets standards for cabling, NICs, protocols, and so on. ISP Internet service provider A company or service that provides access to the Internet for a monthly fee. ITU-TSS International Telecommunications Union-Telecommunications Standards Section An organization that sets international telecommunications standards that govern, in part, the definition of modem speeds and operations; formerly known as the CCITT. Java A programming language that enables embedded motion on a Web page, thus making the Web page more dynamic than static. Java programs you download from the Internet are usually safe from viruses or other harmful additions. jitter The fluctuation of a data packet with respect to the standard clock cycle. JPEG Joint Photographic Experts Group A file format for graphics. A good format to use on the Internet, because the graphic is compressed when saved in this format. Use JPEG for photographs, in particular. jumpers Small switches that complete a circuit between two pins on an adapter card. When you adjust the jumpers, you can change the IRQ, base memory address, or IO port address. Plug and Play cards don’t have jumpers. Kbps kilobits per second A measure of data transmission or network speed. 1Kbps is 1,024bps. kernel The core of the operating system that interfaces directly with the hardware. kilobits per second See Kbps. kilobyte A kilobyte K contains 1,024 bytes. Your file sizes represented in the Windows Explorer, for example, are listed in kilobytes if the files are small. Kilo- is the prefix for 1,000 in the metric system. L1 cache There are two levels of cache in a computer: L1 level 1 and L2 level 2. L1 cache, also known as internal cache, is a small amount of fast memory. See also L2 cache. L2 cache The L2 cache is linked directly to the processor to make it react quicker to proces- sor requests. All computers have L1 cache; not all computers have L2. See also L1 cache. LAN local area network A set of computers and other equipment printers, hubs, and so on that communicate through local cabling using networking protocols. A LAN might refer to a workgroup or clientserver network; it might cover computers in one room or office, in a building, or spanning several buildings. laptop computer A portable computer with a flat screen and keyboard that fold together in one piece. Laptops are larger and heavier than notebooks. They are also older than notebook computers. LAWN local-area wireless network A network that uses radio transmissions to communicate with other computers. leased line Refers to a phone, ISDN, xDSL, frame relay, or other line that is rented for exclusive, 24-hours-a-day, 7-days-a-week use.