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• NIC (Network Interface Card) – a printed circuit board, adapter card or the underlying supporting chipset that snaps into the motherboard of a desktop PC, notebook or server and transmits and receives packets on a network; used to connect to networks including a local area network (LAN), wide area network (WAN), or a broadband network for high-speed cable modem or DSL-based Internet access or other dedicated Internet access service; most common NIC used by small businesses is the 10/100Mbps Ethernet adapter.

• NOS (Network Operating System) – an OS designed for communications between networked computer systems; popular NOS’s include Apple Mac OS, Linux, Microsoft Windows NT/2000 and Novell NetWare.

• Peer-to-Peer Network – an inexpensive alternative to a client/server network in which a PC doubles as both a workstation (used by an end user) and a server (from which resources are shared); although virtually any OS can be configured for peer-to-peer networking, peer-to-peer networks are often assembled from Microsoft’s least expensive consumer OS’s, such as Microsoft Windows 98, Microsoft Windows Me and Microsoft Windows XP Home Edition.

• RAID (redundant array of independent disks) is technology generally used to increase a server’s reliability — by simultaneously writing data to multiple hard drives. While many people also use RAID to improve server performance, RAID eliminates a single point of hard drive failure. Years ago, you could only get the benefits of RAID through SCSI-based hard drives. Today, IDE hard drives can also enjoy entry-level RAID fault tolerance benefits.

• SCSI (small computer systems interface) is a high-end interface for connecting both internal and external computer peripheral devices. Years ago, only SCSI-based storage devices were used in most servers.

• Server – any computing device or peripheral on a network designed to provide shared services and resources to network users; primarily characterized by multi-user usage, as compared to a desktop or notebook PC; common servers include the file, printer, e-mail messaging and collaboration, Web, proxy and database server.

• Wireless Ethernet – set of standards and in-progress standards that allow Ethernet networks to run without physical cabling and utilize radio waves for transmission.

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