Computers To help speed up Web browsing, Windows XP comes with a local cache containing any DNS addresses that have been looked up recently. (For more detail on how Internet addresses work, see this article.) Once an URL has been resolved by an Internet name server into a numerical IP, the information is stored locally. Anytime your browser requests an URL, Windows XP first looks in the local cache to see if it is there before querying the external name server used by your ISP. If it finds the resolved URL locally it uses that IP. This is supposed to save time and cut down on Web traffic Business - List of business/finance/loan/mortgage resources more 1 2 3 4 5 Computers - List of computer hardware/software/peripheral resources more 1 2 3 4 5 Internet - List of webhosting/webdesign/internet marketing resources more 1 2 3 4 5 Software - List of software resources more 1 2 3 4 5 Web Design - List of web design/development resources more 1 2 3 4 5 Web Hosting - List of web hosting resources more 1 2 3 4 5 Web Promotion - List of search engine optimization/internet marketing resources more 1 2 3 4 5 Web Resources - List of other web resources more 1 2 3 4 5 Recreation - List of travel/hotel/cruise resources more 1 2 3 4 5 Casino - List of online gambling/poker/blackjack/roulette resources more 1 2 3 4 5 Health - List of online pharmacy/hospital/health resources more 1 2 3 4 5 Shopping - List of online shopping/gift resources more 1 2 3 4 5 Miscellaneous - List of all other resources not stated above more 1 2 3 4 5   The default time period for keeping an address in the cache is 24 hours. Thus, a problem can arise if the IP for an URL changes before the 24 hour period is up. In this case an error message will result if you try to connect to the URL. It is not a frequent occurrence but is not unknown. Another more common problem can arise from URLs that are temporarily busy or from congested Internet traffic. If a negative response is received from an attempt to connect, that result is also kept in the local cache. The default time period for retaining a negative response is five minutes.

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