abbreviation for distributed denial of service: an occasion when a computer network or website is intentionally prevented from working correctly, by a very large number of users sending data at the same time

A DDoS is a cyber-attack where the perpetrator uses several, often thousands of, unique IP addresses. 分布式拒绝服务是一种网络攻击，攻击时使用多个（通常是数千个）独有的 IP 地址。

Several Internet giants were crippled by DDoS attacks in February last year. 去年二月，一些互联网巨头遭受了分布式拒绝服务攻击。