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。
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.
这需要功能性的服务域方法。
这样，高级别的业务过程功能性为大粒度的服务更加的具体化。
In this way, high-level business process functionality is externalized for large-grained services.
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