Internetwork Packet Exchange

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Internetwork Packet Exchange (IPX) is the network-layer protocol in the IPX/SPX protocol suite. IPX is derived from Xerox Network Systems' IDP. It also has the ability to act as a transport layer protocol. The IPX/SPX protocol suite was used by Novell's network operating system, NetWare, from the late 1980s through the late 1990s. An advantage of IPX was the small memory footprint of the IPX driver, which was vital for MS-DOS and Windows up to Windows 95. Another advantage was easy configuration of the client computers. IPX does not scale well for large networks such as the Internet, and usage decreased as the Internet boom made TCP/IP nearly universal. Computers and networks can run multiple network protocols. After Internet access became important in the early 1990s, IPX sites typically also ran TCP/IP to allow Internet connectivity. Starting with NetWare version 5 in late 1998, it became possible to use Netware without IPX.