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.
1. Creator: FactoryPizzaStore as defined above. It is an abstract class, which defines the method of creating objects. This method is an abstract method, and the specific process of creating objects is implemented by its subclasses. This abstract class usually relies on an abstract Product (another role in the factory method pattern) class. These abstract products are made by subclasses, and the creators do not care what kind of products are made.
由趣游集团与莱彼特传媒联合打造史上首部超时空穿越巨制《黑暗之光》，王李丹妮、陈静仪、潘春春、赵婧伊、韩雪薇、于芷晴六大女神合体，带你一起穿越时空，开启一段奇幻之旅！故事讲述主人公小白因一次意外得到一个记忆眼罩，戴上它就能进入别人的记忆，体会一把高富帅的猎艳生活。全片分为六章，每章一个美女，每章一段福利！坐拥温软的屌丝梦想在这里实现，飞来艳福的暧昧情缘在这里上演！留在神奇眼罩里的美女和记忆，是深渊还是光明；当一切尘埃落定，蓦然回首，是真爱还是幻觉？
Chapter 2 The Adaptability of the Brain
After returning home, many students asked "what have you gained from the three rural areas". What I want to say is "some things can only be understood after experiencing them. Some gains are not at the end but in the process". At present, we are still not students who have gone out of school. We always have many lofty ideals and aspirations. Just like me, I am a freshman, and I always think that I can make great efforts in those developed cities after graduation, and my heart is higher than the sky. I don't think there is anything wrong with this. I have always classified this idea as my personal desire for advancement. But after this trip to the countryside, I seem to have realized something different. Everyone is diligent, everyone expects themselves to work in prosperous areas and enjoy high treatment, which is understandable. However, those who know how to repay the society and spread their light in poor areas are extremely noble. "Three Supports and One Help" is a very good policy to enable more college students to have such opportunities to shine.
"Why?" I went on to ask.
汉王，多保重……话音落地，吕雉一把将两个孩子抱在怀中，从车门上扑了下去。
由余男搭档老戏骨邢佳栋主演的悬疑推理电视剧《谎言真探》开机了，这也是两位大咖阔别多年之后的再一次合作。据悉，《谎言真探》是根据真实案件改编，电影级别制作班底，由霄然影业、77mi.cc酷鲸影业联手打造，于10月17日在青岛低调开机，片场的各种路透资源均处于保密状态，该剧的详细剧情并未曝光，我们敬请期待吧。
原本籍籍无名的美妆博主苏颜兮，阴差阳错代替姐姐贺锦兮成为国潮美妆品牌花颜ceo顾西城的女朋友，利用自己的智慧一路过关斩将，应对来自家庭，事业上的压力，化解种种危机，迎来了属于自己的职业高光时刻，也让顾西城对她刮目相看。在这个过程中，顾西城和苏颜兮互生情愫，但横亘在二人之间的误会让他们都一直抑制着对彼此的情感。而贺锦兮的突然回归，也让二人之间爆发巨大的矛盾，感情跌入冰点.....
小葱听说两位哥哥明儿要起早进山，就为了给她弄生日礼，不禁欣喜异常，嘴里却说道：你们有这份心就好了，还是不要去了。
Let's use the traditional object-oriented pattern to design the code first:
确定回归时间为美国时间2017年10月10日，播出档期为每周二晚八点。
少年张三丰原与师父觉远大师在少林看守藏经阁，不经意地悟道少林功夫，因而被逐出师门，更卷入武林漩涡。高沧海要成为群雄领袖，在武林中暗暗掀起腥风血雨，更将种种罪行嫁祸于三丰，令他四面受敌。反蒙义士洛峻山虽与三丰曾有误会，但二人却识英雄重英雄，最后终联手与海及蒙古人对抗。金人亡国公主完颜容若流落民间，因而结识三丰，二人共渡患难，情素互生，但却因灭金罪魁祸首火龙真人的介入，二人感情遭遇连番波折。几经艰楚，三丰逐渐悟出太极深法，创出太极度拳，与海及蒙古人对抗，经过一场浩劫，容若为救三丰，与高沧海同归于尽，三丰在武当山开家立派，奠立武当派的万世基业！
I have never dared to expect too much, Looking back, Every relationship before, No matter how it started, Towards the end, I found that I was the one who gave more. This is a habit of mine. I will not owe anyone who is good to me and will be doubly good to that person. I think some people in this world are lucky to be good to me, because they could not have been so good to me, but this measure is often difficult to grasp, easy to lose themselves, and in the end it will be easy to become the person who is not treasured.
And this perspective is often smaller than you think.
你对长贵又没信心了？只是不敢想得太好。
女孩认识范依兰，认识断水，也知道断水是蒙恬的佩剑，那便可以认定此女是秦国人。
在SP中，吉高饰演的主人公·伦子在三年后还是单身，不过她依旧没有放弃，前作中和坂口健太郎饰演的金发帅哥KEY是否还有后续呢？ 荣仓奈奈饰演的香成为了人妻，大岛优子饰演的小雪则朝着自己的梦想继续前进，本剧描绘的就是这样的各种问题。
战争啊，战争啊，一切的罪恶之源。
