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Since its basic attack principle is backlog overflow that depends on the end host connection socket, an obvious end host-based solution is to increase the backlog queue size, and this method has been widely used in most servers. Increasing the backlog queue is usually done by modifying the application's listen () function call and an operating system kernel parameter SOMAXCONN, which is used to set the upper limit of backlog that an application can receive. This method itself cannot be completely considered as an effective method to resist SYN flooding, even in some operating systems that can effectively support super large backlog queue allocation, because attackers can arbitrarily generate datagrams much larger than the backlog supported by their operating systems.When approaching the enemy in the air? Shooting down attack: Shooting down enemies in the air to the ground.　天火岛美得如同世外桃源，几乎让人忘记它位于“Ring of Fire”——全球知名的环太平洋火山带。年轻的地质学家李晓梦为了研发首个火山监测系统“朱雀”，带着团队来到了这里。李晓梦的父亲、隐退多年的火山专家李文涛得知后赶到火山口，力图劝说她离开。与此同时，探险专家正楠在美轮美奂的水下溶洞潜水，准备给女友佳慧一个浪漫的求婚……Pingu是一只来自南极的年轻企鹅，它与它的母亲、父亲(当地的邮递员)及年幼的妹妹Pinga一起生活。Pingu只是喜欢玩耍，它很淘气，但心肠很好。如大多数的妹妹一样，Pinga也从不会错过取笑Pingu的机会。不过他们有时候仍然很喜欢相互玩耍。Robby这只海豹是Pingu最要好的朋友之一，不论它们是在一起钓鱼或是玩捉迷藏，它们总要冒很大的险。众臣和书生士子皆可上书言谈。2. Expansion in different places faces problems such as store selection and different policies for running schools in different places.