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Microsoft Internet Information Services (IIS) 5.1 introduces several new security enhancements in Microsoft Windows XP Service Pack 2 (SP2). These security enhancements reduce the overall attack surface of the product.
For additional information about the IIS 5.1 security enhancements in Window XP SP2, see the IIS section of the "Changes to Functionality in Microsoft Windows XP Service Pack 2" TechNet article that is located at the following Microsoft Web site: