The Network Layer (Layer 3) protocol in Novell NetWare for exchanging packets between LANs. IPX is similar to the Internet Protocol (IP), but is not industry standard and has been overwhelmed by IP. Sequenced Packet Exchange (SPX) is the associated Transport Layer (Layer 4) protocol. See also IP, IPX/SPX, LAN, Network Layer, protocol, and SPX.
(Internetwork Packet EXchange) The network layer protocol in the NetWare operating system, which years ago was the major LAN OS. Similar to the IP layer in TCP/IP, it contained a network address and allowed messages to be routed to a different network or subnet. IPX did not guarantee delivery of a complete message. Just like IP packets, NetWare IPX packets could get dropped from overloaded routers, thus either the application had to ensure delivery of the entire message or NetWare's SPX protocol had to be used. See SPX and NetWare.