how to implement barcode system in c# Questions and Answers in C#.NET

Generate Quick Response Code in C#.NET Questions and Answers

Questions and Answers
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Lesson 2 Review
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1. You have deployed ISA Server 2004 and configured the server as a Web proxy server. All internal client computers are configured as Firewall clients. You enable caching on ISA Server, using the default caching configuration. After you enable caching, users report that they are getting more error messages when they try to access some Web sites. You investigate and determine that the error messages appear when a Web site is temporarily unavailable. Users continue to get the error messages for some time after the Web site is available. You need to ensure that the users can access the Web sites as soon as they are available on the Internet. How can you do this
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By default, ISA Server enables negative caching, which means that it will cache error messages from the Internet and return these responses to clients even after the Web site is available. To disable this, you must configure ISA Server to not cache objects that do not have a status code of 200.
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2. You have deployed ISA Server and configured the server as a Web proxy server. After you enable caching, some users report that they get out-of-date information from a partner Web site. The Web site contains information that changes frequently, sometimes several times a day. The users say that the information from the Web site that they see is sometimes more than a day old. You must ensure that users always get the most recent information from the partner Web site, but you do not want to affect the caching configuration for other Web sites. What should you do a. Modify the cache settings so that data that has expired for more than 30 minutes will not be returned to the client. b. Create a cache rule for this Web site. Configure the cache rule to never cache content from the Web site. c. Create a cache rule for this Web site. Configure the cache rule to cache dynamic content. d. Create a cache rule that will apply to all Web sites except this Web site. Configure the cache rule to not cache dynamic content.
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B is correct. In this case, there is likely a problem with the partner Web site, in that it contains information that changes frequently yet the data is still being cached. This can happen if the Web pages do not contain TTL information. To ensure that this data is not cached, configure a cache rule for this Web site. A is incorrect; this option only configures ISA Server s response to expired content when the Internet Web server is not available. C and D will not change the caching behavior in this scenario.
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3. You have configured ISA Server to cache content from a Web site that is updated regularly. You want to ensure that your users never receive an outdated page from cache if the Web site is unavailable. You also want them to be informed if the Web site is unavailable. What settings should you configure
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6
Implementing ISA Server Caching
On the Cache Settings, Advanced tab under the heading If Website of Expired Object Cannot be Reached select Do Not Return the Expired Object (Return an Error Page).
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Lesson 3 Review
1. Users need to access a price list that is published at a public Web site. Bandwidth usage from your office is tightly restricted during business hours. The page is dynamic content and not normally cacheable material. The site is updated once every 24 hours. How can you force ISA Server to download and cache dynamic content and minimize the use of network bandwidth during business hours
Schedule a Content Download job to retrieve the material from the partner s site in advance during non-business hours after it has been updated. It will be available for your users by configuring the download job to Cache if Content is Dynamic in the properties of the job.
2. You have many branch offices with slow connections to the Internet and no direct connection to head office. You have implemented ISA Server 2004 as a firewall solution at all branch offices. You also want to take advantage of the caching ability of ISA Server to allow branch office ISA Server computers to update content from the corporate Web site twice a day during business hours. Due to hardware restrictions, you want the branches to cache only content from your corporate Web site. How would you configure that
Create a Content Download Job for your corporate Web site. Then create a Cache Rule to cache content from your corporate Web site. Create another cache rule to block content caching for all other Web sites. Ensure that the corporate cache rule is listed first.
3. Many users in your organization need access to a partner organization s Web site, so you create a content download job for that Web site. Because the content on the Web site changes daily, you configure the content download job to run every night. After the first time the content download job runs, you notice that the job included much more content than you expected. You notice that many Web sites that are not part of the partner Web site were included in the content download job. You need to ensure that only content from the partner Web site is included in the content download job. How can you do this a. Configure the content download job to use a maximum depth of links per page of 1. b. Configure the content download job to limit the number of objects retrieved to a low number. c. Configure the content download job to not follow links outside the partner organization s Web site URL. d. Configure the content download job to cache only the content that is configured as cacheable.
C is correct. To ensure that only pages from the partner Web site are downloaded, you must configure the job to not download any links outside the Web site URL. A is incorrect because this
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