Novell based its network protocol on Xerox Network Systems (XNS), and created its own standards from IDP and SPP, which it named Internetwork Packet Exchange (IPX) and Sequenced Packet Exchange (SPX).
Novell базировал свой сетевой протокол на XNS и создал свои стандарты IDP и SPP, которым дали имена IPX (Internetwork Packet eXchange) и SPX (Sequenced Packet eXchange).