Worst of all, the DNS (Domain Name Server) computers used by your ISP can be overwhelmed as they try to translate the names of all the websites subscribers want to visit (say, www.economist.com) into their actual internet addresses (216.35.68.215).
In July, security researcher Dan Kaminsky revealed a flaw in the Web's domain name system, or DNS, the protocol that connects a Web site's name with its physical location on the Internet.