inundant

Because the tools of network attack are inundant and the protocol is imperfect, Distributed Denial of Service（DDoS） attack is an attack manner once leading to widest harm, which is hardest to defense.

络攻击工具的泛滥，及络协议的缺陷，使得分布式拒绝服务（DDoS）攻击为络中危害面广、难以防御的攻击方式。