Ipx Address; Socket; Routing Information Protocol (Rip); Service Advertising Protocol (Sap) - Netopia R2020 User Reference Manual

11-2 User's Reference Guide

IPX address

An IPX address consists of a network number, a node number, and a socket number. An IPX network number is
composed of eight hexadecimal digits. The network number must be the same for all nodes on a particular
physical network segment. The node number is composed of twelve hexadecimal digits and is usually the
hardware address of the interface card. The node number must be unique inside the particular IPX network.
Socket numbers correspond to the particular service being accessed.

Socket

A socket in IPX is the equivalent of a port in TCP/IP. Sockets route packets to different processes within a
single node. Novell has reserved several sockets for use in the NetWare environment:
Field Value
00h
01h
04h
05h
11h
14h

Routing Information Protocol (RIP)

RIP, which was also derived from XNS, is a protocol that allows for the bidirectional transfer of routing tables
and provides timing information (ticks), so that the fastest route to a destination can be determined. IPX
routers use RIP to create and dynamically maintain databases of internetwork routing information. See the last
section in this chapter for more information on routing tables.

Service Advertising Protocol (SAP)

SAP is a protocol that provides servers and routers with a method to exchange service information. Using SAP,
servers advertise their services and addresses. Routers collect this information to dynamically update their
routing tables and share it with other routers. These broadcasts keep all routers on the internetwork
synchronized and provide real-time information on accessible servers on the internetwork.
Packet Type
Unknown Packet Type
Routing Information Packet
Service Advertising Packet
Sequenced Packet
NetWare Core Protocol Packet
Propagated Packet
Description
Used for all packets not clas-
sified by any other type
Unused for RIP packets
Used for SAP packets
Used for SPX packets
Used for NCP packets
Used for Novell NetBIOS