Paul Mockapetris, the co-creator of the domain name system, theorizes that the Internet is susceptible to a catastrophic failure due to a DNS attack. Although DNS has evolved greatly in the more than three decades since its development, he surmises that perhaps it hasn’t evolved enough or at least not as rapidly as other aspects of the Internet. Part of the problem may be a lack of competition. After all, there are still only about two dozen distinct DNS applications
or domain name servers in widespread usage.