Solaris™ 8 Network Administrator Certification Training Guide

INTRODUCTION

Interconnection is what the Internet is all about. Whenever networks are connected together, a mechanism must exist by which data packets can be filtered and routed to other connected networks. As mentioned in Chapter 1, “Introduction to Computer Networks,” routers are the devices used to connect networks together. Sometimes these routers are called gateways. The term gateway was used in a different context in Chapter 1, but from this point on, router and gateway are used interchangeably in this book unless explicitly differentiated.

This chapter starts with an introduction to TCP/IP network planning. There is some description of network addresses and how communication takes place among multiple networks connected by routers. There ...