Sequenced packet exchange
Sequenced Packet Exchange (
SPX) is an old
Novell protocol used to manage the Novell Internetwork Packet Exchange (
IPX) that allowed Novell Servers and clients to communicate over LAN (
Local Area Networks) and WAN (
Wide Area Networks).
The advantages of one machine easily finding another machine on the LAN was a disavantage on a WAN since it needed so much overhead. TCP/IP is now a more common protocol stack for both WAN and LAN.