Sequenced Packet Exchange
<networking, protocol> (SPX) A transport layer protocol built on top of IPX. SPX is used in Novell NetWare systems for communications in client/server application programs, e.g. BTRIEVE (ISAM manager). SPX is not used for connections to the file server itself; this uses NCP. It has been extended as SPX-II. SPX/IPX perform equivalent functions to TCP/IP. http://developer.novell.com/research/appnotes/1995/december/03/04.htm. [Better reference?] (1999-05-27) | ||||
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Sequenced Packet Exchange Definition from Language, Idioms & Slang Dictionaries & Glossaries
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sequenced packet exchange
sequenced packet exchange
(spx) a transport layer protocol built on top of ipx. spx is used in novell netware systems for communications in client/server application programs , e.g. btrieve (isam manager).
sequenced packet exchange
(spx) a transport layer protocol built on top of ipx. spx is used in novell netware systems for communications in client/server application programs , e.g. btrieve (isam manager).
Sequenced Packet Exchange Definition from Encyclopedia Dictionaries & Glossaries
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IPX/SPX
IPX/SPX stands for Internetwork Packet Exchange/Sequenced Packet Exchange. It is a networking protocol used by the Novell NetWare operating systems. Like UDP, IPX is a datagram protocol used for connectionless communications. IPX and SPX are derived from Xerox Network Services' IDP and SPP protocols.
SPX is a transport layer protocol (layer 4 of the OSI Model) used in Novell Netware networks. The SPX layer sits on top of the IPX layer (layer 3 - the network layer) and provides connection-oriented services between two nodes on the network. SPX is used primarily by client/server applications.
IPX and SPX both provide connection services similar to TCP/IP, with the IPX protocol having similarities to IP, and SPX having similarities to TCP. IPX/SPX was primarily designed for local area networks (LANs), and is a very efficient protocol for this purpose (typically its performance exceeds that of TCP/IP on a LAN). TCP/IP has, however, become the de facto standard protocol. This is in part due to its superior performance over wide area networks and the Internet (which uses TCP/IP exclusively), and also because TCP/IP is a more mature protocol, designed specifically with this purpose in mind.
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