how to implement barcode system in c# Lesson Summary in Visual C#

Creator Quick Response Code in Visual C# Lesson Summary

Lesson Summary
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Decoding QR Code 2d Barcode In Visual C#
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Content download jobs are used to populate the ISA Server cache with content before any user requests the information. Content download jobs are configured on a site-by-site basis and include several configuration options such as scheduling the download, and configuring what types of data are cached and how long the data is kept stored in the cache. After you configure content download jobs, you can modify the job setting or configure other content download job settings.
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Real World
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What Is the Future of Caching
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Caching is a valuable function of ISA Server 2004. However, as the Internet becomes more dynamic and interactive, the amount of cacheable content will decrease and with it, the value of caching Web content. The use of Active Server Pages, .NET programming technologies, and more user-friendly programming languages means that there is less static content on public Web sites. Software packages such as Microsoft FrontPage 2003 have made sophisticated Web site development available to almost everyone. No longer do you need to be a programming wizard to include dynamic content on your site. Often, the only cacheable content on a public Web site is a home page that merely provides links to dynamic content.
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Lesson 3
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Configuring Content Download Jobs
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6-39
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Perhaps the most useful feature of caching today, and the long-term future of caching, may be between business partners or for internal use. The branch-office scenarios, in which branch offices with slow links make use of content download jobs to download head-office Web content to their local ISA Server computer, will always have value. Reports and other types of information can be generated at the head office and published to an internal site to be downloaded to branch offices on a regular schedule to give employees access to up to date information without many individuals using bandwidth during the day to access the same content. Similar situations can exist between clients and vendors in which updated price lists or other information can be downloaded to clients on a regular basis.
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Case Scenario Exercises
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In this exercise, you will read two scenarios about configuring caching on ISA Server 2004, and then answer the questions that follow. If you have difficulty completing this work, review the material in this chapter before beginning the next chapter. You can find answers to these questions in the Questions and Answers section at the end of this chapter.
Scenario 1
You work for an organization with branch offices located across the country. Some of those offices are in remote areas and are connected to the Internet by a dial-up connection with expensive daytime rates. Users in all branch offices need to access a number of public and partner Web sites to do their jobs. These users report that they must wait for extended periods to access those sites. Some of those sites contain dynamic content.
Scenario 1 Question
1. You want to increase response times for users at the branch offices and reduce the costs for the Internet connections. What steps should you take
6-40
6
Implementing ISA Server Caching
Scenario 2
You publish a Web site in your perimeter network using a Web publishing rule. The content on the Web site is updated frequently throughout the day as you perform random updates of your page as new data becomes available. The content is accessed and used by your business partners.
Scenario 2 Question
1. Because you perform unscheduled updates of the data, you must ensure that the content cannot be cached by your business partners so that they always get the most up-to-date information. What steps must you take
Summary
Caching is the ability of the ISA Server 2004 to retrieve and store cacheable Web content so that, the next time a client requests the same content, it can be retrieved from the cache file to provide faster response and reduce bandwidth consumption. Content download jobs allow you to prepopulate the ISA Server cache content. ISA Server also enables Web proxy chaining that can allow branch offices to take advantage of a larger cache maintained at head office and use it to build up cached content at the branch office. Caching is not enabled by default on ISA Server 2004. To enable caching, you need to configure a cache drive. You can also configure cache rules to specify custom rules for how content is downloaded from a specific Web site. Content download jobs are configured on a site-by-site basis. When you configure content download jobs, you can specify what Web sites are downloaded as well as configure settings for how the content is cached.
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