Although distributed denial of service attacks do not harm a database, they are generally carried out to prevent people having access to an Internet site or to prevent a service from functioning.

分布式拒绝服务攻击并没有用来侵入后台数据库，这一攻击多用来阻止用户正常进入某些网页，或者阻止一些功能性服务的正常使用。

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And third, there's the scenario of domain names as nothing more than a level of indirection in Internet numbering, allowing sites to move without notifying every last database and spreading loads among sites with the same service.

CNN: Opinion: The Internet's identity crisis