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.
Structural pattern
The real name of this factory is: Hangzhou Green Energy Environmental Protection Power Generation Co., Ltd. Waste Incineration Power Plant (Zihongling, Shaner Village, Puyan Town), Wearing the cloak of environmental protection, it is harmful to one side. As we all know, garbage incineration will release highly toxic dioxin, heavy metal dust and PM2.5, which will directly enter the human body through our breathing, while the other part will fall to the soil, be absorbed by vegetables and other plants and finally enter our body. Dioxin is very toxic, 900 times as much as arsenic. It is called "the poison of the century" and also has reproductive toxicity and genotoxicity. The International Cancer Research Center has listed it as a first-class carcinogen for human beings.
该作改编自同名小说，讲述曾获得过一次大奖后就默默无闻的作家，疏远了自己作为编辑者的发小#小柳友#，之后遇到了自己的粉丝#樱庭奈奈美#，打算出一本书来改变目前出版业不景气的现状，这将是一部献给所有社会人士的热血作品。
汪滶喘着粗气，几乎要哭出来，口不能言。
我想这也不算什么大事，咱们早早地把女娃儿送去开蒙，然后学到十来岁，就让她们回来。
她惊奇地问：这茶楼也卖酒菜？王穷摇头道：不是。
一排宫灯引路，一驾小型车辇缓缓驶来，在跨院门口停下。
国家地理频道电视电影（四小时迷你剧）《圣徒与陌生人》（Saints & Strangers）描述了美国的起源——1620年，35名追求宗教自由的英国宗教分裂分子（分离派清教徒）与14名契约奴隶、53名工匠 、渔民、贫苦农民、冒险客、罪犯坐上五月花号（Mayflower），从普文斯敦港启程前往北美大陆。经过66天的艰难航行，他们抵达了目的地。看到「新世界」（New World）的那一刻，五月花号上的所有人都如释重负。分离派清教徒相信他们在「新世界」能自由表达宗教信仰，并以此为基础创建新的社会秩序。但对这些刚刚闯过疾病、极恶与死亡挑战的旅行者来说，他们的旅程才刚刚开始——文化差异、气候问题、与土著居民的矛盾冲突、对信仰和意识形态的质疑，时时刻刻都在考验着他们的毅力和决心。但他们最终克服一切挑战建立起北美地区第一块殖民地，这就是日后人们所知的「美国」。
小长工小虎子被财主欺凌，一次，在财主的逼迫下不得不连夜挑水的他，发现一个身穿红肚兜的娃娃在井边玩耍，便与他成了好朋友。娃娃看到小虎子被财主打得伤痕累累，为了帮，获得自由，便送给他一株大人参。财主见了大人参，喜出望外，但非常奇怪小虎子如何得到人参，便逼问他说清楚人参的来历。财主料想娃娃是个人参精，便设计要小虎子带他去找穿红肚兜的娃娃。小虎子知道财主不安好心，当夜悄悄去给娃娃送信。不料财主在后边偷偷跟踪，见到人参娃娃后，一把抓住人参娃娃的辫子，小虎子奋力咬住财主手臂，救出人参娃娃，人参娃娃迅速遁入土中。就在财主恼羞成怒，要害死小虎子的时候，人参娃娃又跳出来吸引财主的注意。财主为了得到人参娃娃，挖土掘洞，当他在洞底寻找人参娃娃时，突然山摇地动，泥土和石块把财主埋在洞里。
同治三年（公元1864）太平天国作乱，福建省骠骑将军林文豪连年争战杀场，趁着回台空隙探望妻儿，不料竟撞见其妻宝霞因不耐长年忍受丈夫不在身边的孤独，决心与文豪多年好友朱士贵私奔，林文豪几经挣扎，决定放宝霞走，往后孤独一人带着女儿林玉环在战场上杀长毛军报效国家。
Of course, there are also good ones. The next few are all Thai stars with extremely high Yan value.
此时，堂上堂下落针可闻。
这个穿着蒙古军装的汉子把张无忌带来这里，原本是想用张无忌逼迫张翠山夫妇说出谢逊的下落，但是没有想到，张无忌看到父亲惨死，一时激动，拼命喊出声音。
约会实验室第二季……
都不能吃，凭啥你们没拔萝卜的大吃大喝？他就要为小孙子讨公道。
Setting position, fan installation position, fan number, fan type, smoke control and exhaust system diagram.
此中甘鲜，唯有乡村野老，躬耕园圃者方能日日得之，难怪将军看不上这些酒家了。
我就是没福气的，天生的吃腌菜命。
