O'Reilly logo

VPNs Illustrated: Tunnels, VPNs, and IPsec by Jon C. Snader

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Preface

Introduction

There is a revolution going on in enterprise networking. Until very recently, enterprises that needed to link computers in geographically dispersed locations had to build their own wide area networks (WANs). Usually this meant renting expensive and, by today’s Internet standard, relatively slow frame relay circuits. A typical 56 Kb/s circuit could cost several hundred, or even over a thousand, dollars a month.

Today, the typical home computer user enjoys a broadband Internet connection having a 5 Mb/s download speed for a cost of about $40 per month. Commercial variants of this service, offering higher speeds and other amenities, are available for between $100 and $200 per month. Obviously, this significant increase ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required