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Problems at healthcare website not from online attack, experts say

The New York Times, October 3, 2013
As the federal government struggled on Wednesday to explain the technical problems experienced by would-be users of the health exchange Web site,, computer security specialists say they had ruled out a cyberattack known as a denial of service, or DDoS, attack. Those occur when attackers fire huge amounts of traffic at a Web site until it collapses under the load. Such attacks typically entail hundreds of millions of data requests to a site per second. The federal health care site experienced 4.7 million unique visitors in the first 24 hours.