Quote
While Vixie took issue with reports that the attack had been the "largest ever," he did say that aspects of the data flood made it unusual. "There have been (previous) attacks against the root domain servers--yes," he said. "But it is rare to have attacks against all 13 at the same time."
Still, the results of the latest attack were not severe. At the attack's peak, access to the entire DNS network dropped to an average of 94 percent, down only slightly from normal levels near 100 percent, according to Matrix NetSystems.