30
C
HAPTER
1: W
EB
C
ACHING
C
ONCEPTS
AND
D
EPLOYMENT
This hop-by-hop process continues until the IP packets reach the remote
destination.
The default router should be a device that is closer than the Webcache to
the WAN link in your network, which the Webcache can send Web
requests to in order to retrieve Web objects from the Internet. The default
router can be a firewall, internet gateway device, router or a switch.
To configure the Webcache, enter the IP address of the default router on
the local subnet in which the Webcache is located. If no default router
exists on your network leave the field blank.
Web Caching
Overview
In a network without a Webcache, all Web requests from browsers on
client machines must travel across the expensive WAN to the origin Web
server (the Web server that contains the original copy of the requested
information), and the response from the server must travel back across
the WAN, as shown in
Figure 1
:
Figure 1
A Typical Web Request
The prime objective of web caching is to store Web content close to the
client machines that request it. This enables the content to be served
more quickly to the end user and reduces the amount of traffic on the
WAN. To achieve this aim, the Webcache is deployed in your LAN
dua1611-5aaa04.book Page 30 Friday, November 29, 2002 8:56 PM
Содержание SuperStack 3 WEBCACHE 1000
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Страница 22: ...22 dua1611 5aaa04 book Page 22 Friday November 29 2002 8 56 PM ...
Страница 58: ...58 CHAPTER 1 WEB CACHING CONCEPTS AND DEPLOYMENT dua1611 5aaa04 book Page 58 Friday November 29 2002 8 56 PM ...
Страница 78: ...78 CHAPTER 2 INSTALLING THE WEBCACHE dua1611 5aaa04 book Page 78 Friday November 29 2002 8 56 PM ...
Страница 80: ...80 dua1611 5aaa04 book Page 80 Friday November 29 2002 8 56 PM ...
Страница 102: ...102 CHAPTER 4 USING THE WEB INTERFACE dua1611 5aaa04 book Page 102 Friday November 29 2002 8 56 PM ...
Страница 110: ...110 dua1611 5aaa04 book Page 110 Friday November 29 2002 8 56 PM ...
Страница 126: ...126 CHAPTER 6 CONFIGURING DEPLOYMENT MODES dua1611 5aaa04 book Page 126 Friday November 29 2002 8 56 PM ...
Страница 136: ...136 CHAPTER 8 SYSTEM TIME dua1611 5aaa04 book Page 136 Friday November 29 2002 8 56 PM ...
Страница 138: ...138 dua1611 5aaa04 book Page 138 Friday November 29 2002 8 56 PM ...
Страница 144: ...144 CHAPTER 9 MONITORING WEB ACCESS dua1611 5aaa04 book Page 144 Friday November 29 2002 8 56 PM ...
Страница 178: ...178 CHAPTER 10 USING CONTENT FILTERING dua1611 5aaa04 book Page 178 Friday November 29 2002 8 56 PM ...
Страница 180: ...180 dua1611 5aaa04 book Page 180 Friday November 29 2002 8 56 PM ...
Страница 192: ...192 CHAPTER 11 CONTROLLING HOW WEB SITES ARE CACHED dua1611 5aaa04 book Page 192 Friday November 29 2002 8 56 PM ...
Страница 204: ...204 CHAPTER 12 PRELOADING CONTENT dua1611 5aaa04 book Page 204 Friday November 29 2002 8 56 PM ...
Страница 206: ...206 dua1611 5aaa04 book Page 206 Friday November 29 2002 8 56 PM ...
Страница 218: ...218 CHAPTER 13 MONITORING SYSTEM EVENTS dua1611 5aaa04 book Page 218 Friday November 29 2002 8 56 PM ...
Страница 234: ...234 dua1611 5aaa04 book Page 234 Friday November 29 2002 8 56 PM ...
Страница 248: ...248 CHAPTER 17 SOFTWARE UPGRADES dua1611 5aaa04 book Page 248 Friday November 29 2002 8 56 PM ...
Страница 250: ...250 dua1611 5aaa04 book Page 250 Friday November 29 2002 8 56 PM ...
Страница 272: ...272 CHAPTER 18 COMMAND LINE INTERFACE dua1611 5aaa04 book Page 272 Friday November 29 2002 8 56 PM ...
Страница 273: ...IX PROBLEM SOLVING Chapter 19 Problem Solving dua1611 5aaa04 book Page 273 Friday November 29 2002 8 56 PM ...
Страница 274: ...274 dua1611 5aaa04 book Page 274 Friday November 29 2002 8 56 PM ...
Страница 286: ...286 dua1611 5aaa04 book Page 286 Friday November 29 2002 8 56 PM ...
Страница 294: ...294 APPENDIX A SAFETY INFORMATION dua1611 5aaa04 book Page 294 Friday November 29 2002 8 56 PM ...
Страница 298: ...298 APPENDIX B CABLE SPECIFICATIONS AND PIN OUTS dua1611 5aaa04 book Page 298 Friday November 29 2002 8 56 PM ...
Страница 312: ...312 APPENDIX E DEFAULT SETTINGS FOR THE WEBCACHE dua1611 5aaa04 book Page 312 Friday November 29 2002 8 56 PM ...
Страница 334: ...334 APPENDIX I TRACE ROUTE SYMBOLS dua1611 5aaa04 book Page 334 Friday November 29 2002 8 56 PM ...
Страница 348: ...348 GLOSSARY dua1611 5aaa04 book Page 348 Friday November 29 2002 8 56 PM ...