A network protocol is a data communication language. There are three primary network
protocols used: TCP/IP, NetBEUI, and IPX/SPX. TCP/IP (Transport Control Protocol/
Internet Protocol) is the most common network protocol and is used when accessing the
Internet. Most companies (and homes) use TCP/IP as their standard protocol. IPX/SPX
(Internetwork Packet Exchange/Sequenced Packet Exchange) is used when connecting
to a Novell network, but Novell networks now use TCP/IP as their standard protocol.
NetBEUI (NetBIOS Enhanced User Interface) is a non-routable network protocol. This
means that it can only be used on simple networks, not on multiple networks that are tied
together. A common place for NetBEUI is on a peer-to-peer network.
Another network protocol is AppleTalk. AppleTalk was used with Apple Macintosh
computers. Apple computers today use TCP/IP.

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