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Distributed Denial of Service Attacks: Multiple attackers in different locations attack one or several targets at the same time, Or one or more attackers take control of multiple machines located in different locations and use these machines to attack the victim simultaneously. This kind of attack is called Distributed Denial of Service attack because the point of origin of the attack is distributed in different places.简单客套问问夜里睡得好不好早饭吃的怎么样后，林朝曦直白道明了来意。改编自LazySheep的小说《红线》。在这种形势下，何心隐献借刀杀人之计，杨长帆虽然不确定能否成功，但绝对可以一试。The works, community topics, user comments, content or pictures uploaded by users included in this site are all personal behaviors of users. If the above content infringes your rights and interests, welcome to report the complaint. Once verified, it will be deleted immediately and this site will not assume any responsibility.Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.