Netgear RH348 User Manual download pdf (Page 25)

Reference Guide for the Model RT328 and Model RH348 ISDN Routers

Introduction 1-7

Using RIP, routers update one another periodically and check to see if there are any changes to be

added to the routing table. An important consideration is the convergence time, or how long it

takes for a change to the routing topology (such as a new node or a node failure), to be propagated

throughout the entire RIP environment. To prevent this convergence process from being

excessively long, RIP is limited to 15 hops maximum.

The Model RT328/RH348 router supports both the older RIP-1 and the newer RIP-2 protocols.

Among other improvements, RIP-2 supports subnetting and multicasting.

IP Addresses and the Internet

Because TCP/IP networks are interconnected widely across the world, every machine on the

Internet must have a unique address to make sure that transmitted data reaches the correct

destination. Blocks of addresses are assigned to organizations by the Internet Assigned Numbers

Authority (IANA). Individual users and small organizations may obtain their addresses either from

the IANA or from an Internet service provider (ISP).

The Internet Protocol (IP) uses a 32-bit address structure. The address is usually written in dot

notation (also called dotted-decimal notation), in which each group of eight bits is written in

decimal form, separated by decimal points. For example, the binary address:

11000011 00100010 00001100 00000111

is normally written as:

195.34.12.7

which is easier to remember and easier to enter into your computer.

In addition, the 32 bits of the address are subdivided into two parts. The ﬁrst part of the address

identiﬁes the network, and the second part identiﬁes the host node or station on the network. The

dividing point may vary depending on the address range and the application.

Intro.fm Page 7 Tuesday, October 10, 2000 3:15 PM

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Netgear RH348 User Manual Page 25