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World Wide Web (WWW) was developed in 1990. Since then, Internet grows very rapidly and becomes very popular. Only in a few years, Internet has resulted in a revolution of human communication. As it provides lots of information, Internet becomes the most important media for people to access and obtain information.
Now, most of companies are using World Wide Web (WWW) as the first interface with their clients. In order to provide most updated information, the contents in their web pages have to be frequently revised. However, because of poor management on web pages, people may delete or shift URL position accidentally, which causes mismatch with its original access path and leads to a failure in linking to web pages. Such a problem may cause inconvenience to customers, and it can further damage the image of the company and may cause business loss.
This problem is called "lost link ", and is shown with the wrong code of "error 404" on the browser. Generally speaking, it is very frequent that the probability of having "error 404" wrong code while browsing through web pages. Consequently enterprises and website administrators have hoped that there exists some tools to check the integrity of their websites and then to help improving the images of enterprises. In this thesis, we propose a kind of measuring tool taking network land (Domain Name ) as datum and solve this problem.
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