Sequenced Packet Exchange

What Does Sequenced Packet Exchange Mean?

Sequenced Packet Exchange (SPX) is a sequencing protocol for network packets used with Novell NetWare. Internetwork Packet Exchange (IPX) handles SPX packet forwarding.

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NetWare communication requires a NetWare Core Protocol (NCP)-supported transport protocol, such as IPX/SPX, TCP/IP, or both.

Techopedia Explains Sequenced Packet Exchange

SPX is primarily used for client/server applications to provide connection-oriented network services similar to TCP/IP. SPX sits above IPX, which is a network layer protocol.

IPX/SPX is derived from Internet Datagram Protocol (IDP) and Sequenced Packet Protocol (SPP), which are Xerox Network Systems protocols that provide routing capability and sequenced and connectionless packet delivery support.

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Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.