distributed denial of service

基本解释

Officials in both Seoul and Washington, DC, said they were suffering “distributed denial of service” overload (known as DDOS in geekspeak).
首尔与华府的官员声称他们经历了“分布式拒绝服务”过载（在极客术语中被称为DDOS）。
A distributed denial of service attack involves using many computers to bombard a Web site with an overload of traffic, knocking it offline.
分布式的拒绝服务攻击需要用许多台电脑对一个网站集中进行流量轰炸，使其因负担过重而不能提供正常的服务。
Krebs on Security reports that for a few hundred dollars you can go to an underground forum and hire someone (evidently Russian) to mount a distributed denial of service (DDoS) attack on a site.
Krebs on Security报告称，只需几百美元，你就能到地下论坛上雇个人（显然是俄罗斯人），对某个网站发起分布式拒绝服务攻击（DDoS）。

In 2002 they were flooded with traffic from tens of thousands of infected computers in an unsolved "distributed denial of service" attack.
FORBES: The Next Threat
Botnets can send spam and flood Web sites with countless requests for information, a cyber attack also known as distributed denial of service.
FORBES: Made For Hacking