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Internetworking Technologies Handbook, Fourth Edition by Cisco Systems, Inc.

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Chapter 54. Network Caching Technologies

Objectives

  • Describe current network traffic overload issues.

  • Describe how caching solves many of those issues.

  • Describe how network caching works.

  • Describe different caching technologies in use today.

Introduction

Although the volume of Web traffic on the Internet is staggering, a large percentage of that traffic is redundant–multiple users at any given site request much of the same content. This means that a significant percentage of the WAN infrastructure carries the identical content (and identical requests for it) day after day. Eliminating a significant amount of recurring telecommunications charges offers an enormous savings opportunity for enterprise and service provider customers.

Web caching performs ...

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