|
Protocol |
Function |
Related OSI Layer(s) |
|---|---|---|
|
Internetwork Packet Exchange (IPX) |
A connectionless transport protocol that is primarily responsible for logical network addressing, route selections, and connection services. |
Network, Transport |
|
NetWare Link State Protocol (NLSP) |
NLSP uses a link-state route discovery method to build routing tables. |
Network |
|
NetWare Core Protocol (NCP) |
NCP is a connection-oriented protocol that provides the connection between clients and services. |
Application, Presentation, Session |
|
Routing Information Protocol (RIP) |
Similar to the routing protocol used with TCP/IP, RIP is responsible for the routing of packets on an IPX/SPX network. |
Network |
|
Service Advertising Protocol (SAP) |
SAP allows systems providing services to the network, such as file and print services, to announce their services and addresses to the network. |
Application, Presentation, Session |
|
Sequenced Packet Exchange (SPX) |
SPX is a connection-based protocol used when guaranteed message delivery is required on the network. |
Transport |
Internetwork Packet Exchange/Sequenced Packet Exchange
Like TCP/IP and AppleTalk that are also discussed in this chapter, IPX/SPX is not a single protocol but rather a protocol suite. IPX/SPX was created by Novell for use on Novell networks. When Novell had a larger presence in the network arena, so too did the IPX/SPX protocol suite. Today, the popularity of IPX/SPX has yielded to TCP/IP although it is still used in some network environments enough. TCP/IP's suitability for large multisite networks and its general acceptance has now even led Novell to adopt TCP/IP as the protocol of choice. Table 3 shows some of the protocols that comprise the IPX/SPX suite and their functions.
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