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Attack floods Internet root servers with 5 million queries a second

Early last week, one of the most vital organs of the Internet anatomy came under an unusual attack. On two separate occasions lasting an hour or more each, a flood of as many as many as five million queries per second hit multiple domain name system root servers that act as the final and authoritative reference for determining which IP address is returned when a user types a domain name into a browser.

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arstechnica.com
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