As written above, Windows XP uses a DNS cache to store recently visited Internet addresses. This cache is referred to before a request is sent out over the Internet when the user requests a web page address. If the IP address corresponding to the web address is in the cache, that address gets used, saving time. If it is not, your computer needs to find out the correct IP address by asking a DNS server over the Internet.

Items are kept in the cache for a finite amount of time and are constantly bumped to make room for more recent addresses. By increasing the size of the DNS cache, you can increase the speed of your web browsing, especially if you regularly check the same web pages. (more…)

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