Contents
v
Preface
Purpose ........................................................................................................................... xv
Audience .......................................................................................................................... xv
Conventions .....................................................................................................................xvi
Special Message Formats .........................................................................................xvi
Use of Enter, Type, and Press ...................................................................................xvi
Other Conventions ...................................................................................................xvii
Related Publications .......................................................................................................xvii
Chapter 1 Introduction
About the Router ............................................................................................................1-1
Features ..........................................................................................................................1-1
Key Features ............................................................................................................1-2
V.90 Support ............................................................................................................1-3
TCP/IP Support ........................................................................................................1-3
IP Address Masquerading by Dynamic NAT+ ....................................................1-3
Automatic Configuration of Attached PCs by DHCP ..........................................1-3
Security ....................................................................................................................1-4
Calling Line Identification ...................................................................................1-4
PAP and CHAP Authentication ..........................................................................1-4
Callback .............................................................................................................1-4
Management Support ..............................................................................................1-4
Basic Router Concepts ...................................................................................................1-5
What is a Router? ....................................................................................................1-5
Routing Information Protocol ....................................................................................1-5
IP Addresses and the Internet .................................................................................1-6
Netmask ...................................................................................................................1-8
Subnet Addressing ...................................................................................................1-9
