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SYN attack is a kind of DOS attack. It takes advantage of TCP protocol defects and consumes CPU and memory resources by sending a large number of semi-connection requests. SYN attacks can not only affect hosts, but also harm network systems such as routers and firewalls. In fact, SYN attacks can be implemented as long as these systems turn on TCP services no matter what systems are targeted. As can be seen from the above figure, the server receives the connection request (syn=j), adds this information to the unconnected queue, and sends the request packet to the client (syn=k, ack=j+1), then enters the SYN_RECV state. When the server does not receive an acknowledgement packet from the client, it retransmits the request packet and does not delete this entry from the non-connection queue until the timeout. With IP spoofing, SYN attacks can achieve good results, Typically, clients forge a large number of non-existent IP addresses in a short period of time, SYN packets are continuously sent to the server, and the server replies to the confirmation packets and waits for the confirmation of the customer. Since the source address does not exist, the server needs to continuously resend until it timeout. These forged SYN packets will occupy the unconnected queue for a long time, normal SYN requests will be discarded, the target system will run slowly, and in serious cases, the network will be blocked or even the system will be paralyzed.Var Interview = function () {};胡一八与王胖子是大学同学，他们为了女神杨子怡来北京做北漂一族。因为没有钱，二人选择在天桥上给人看风水算命骗钱，王胖子给胡一八当托儿，被路人识破，胡一八与王胖子为此大吵一架。就在两人绝望之时，一位神色匆匆的老太太找到两人，表示愿意出钱请胡一八帮忙驱鬼。何家三个儿子，老大在机关做出纳，老二经营一家中型公司，老三从小最受宠，如今仍没有定性，工作三天打鱼两天晒网。家里一个婆婆三个媳妇平日里就在为各种鸡毛蒜皮的事斗智斗勇。公公临终前让老三结婚，把老房子和30万留给一事无成的老三，不想却让战火升级；刚巧老二因为小三和媳妇儿离婚，何家多出一个新妯娌，家里战火升级。老房子七八百万的拆迁费该归谁，老大和老三两家为此撕破了脸皮。于是在方寸之家，也用上了三国之谋。但妯娌们在经历了各种矛盾和风雨后，还是回到了婆婆身边。她们发现，人生中最重要的不是钱、房子，而是亲情。8-10 Great Magician: In the program you wrote to complete Exercise 8-9, write a function called make _ great (), modify the list of magicians, and add the word "the Great" to each magician's name. Call the function show_magicians () to confirm that the magician list has indeed changed. ?该节目由真实投诉个案改编而成，并以戏剧形式向大众展示独立监察警方处理投诉委员会(监警会)的工作重点，包括投诉个案的举证门槛、两层架构投诉警察制度的运作、委员以及秘书处的工作程序、会方与投诉警察课的分工和互动、搜证、观察员的角色等。透过剧集，观众可进一步认识监警会的职能，以及会方在投诉警察制度中所发挥的作用。要是郡主嫁进来，没准过不惯。