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.
Advantages and Disadvantages of 2 Events
上世纪九十年代的上海，朱锁锁和蒋南孙家境不同，性格不同，但同样美丽、聪慧。年少时，锁锁家境不好，南孙家收留、帮助过锁锁，因此她们结下了深厚的友谊。步入社会后，朱锁锁在职场中起伏，凭着才智和优秀的条件很快发达起来，蒋南孙则继续追求学业，谈起恋爱，变得更加知性。后来，蒋家落难，朱锁锁帮助南孙走出校园，为其提供住处和工作，蒋南孙亦靠努力和学识，逐渐成为一名出色的白领丽人。朱锁锁结婚，看似风光，婚姻却不被丈夫的家人认可，夫妻关系亮起红灯时，蒋南孙帮助她照顾孩子，料理她的生活，直到朱锁锁有勇气走出困局。人事沧桑，岁月无情，她们遍尝了生活的个中滋味，却互相扶持，同甘共苦，不仅将生活经营出多彩的模样，亦各自成为最成熟的女人，拥有自己的流金岁月。
李云扬的对手是博时集团董事长乔云风，乔云风可谓是呼风唤雨的铁腕级任务，可是常言道树大招风，身家几十亿的资产的乔云风早就成为黑社会组织洗劫财产的攻击目标，李云扬在复仇过程中万完没想到自己挫杀的对象原来是自己的亲生父亲。
When the primary server fails, an automatic failover is forced to start without asking other Sentinels for comments, but it will send the other Sentinels an up-to-date configuration, and the other Sentinels will update according to this configuration.
这剧是讲述恋爱细胞为零的现代版丘比特男人吴秀与被狠狠拒绝的恋爱黑洞女人宥利之间的爱情故事。李宗泫、金素恩主演。由《我的遗憾男友》南奇勋导演执导、郑宥善作家联手合作。
杨长帆正有意也让徐文长何心隐品断此人，就此召见。
Mystery:
《有问必达》是天津卫视的一档新节目，英达将首次涉猎职场话题。访谈中，英达扮演的刺儿头员工会向老板们频频抛出难题，比如长期请病假、不服裁员、对老板言语威胁等，跟观众分享更多的职场实例，告诉大家如何在职场中保护自我权益。
说来也怪，同是一脉狼兵，到了杨长帆手下跟卫所军士与江湖募兵一混杂，竟是被扣上了杨家军的帽子，一时之间声名鹊起，由于其鬼神莫测的何以特俺的日旺战术，一个月内，名声直压老牌劲旅俞家军。
Ma Yihong, founder of Tong Wangxing: "Thinking is an ability, It's not exam work, The thinking ability curriculum should not be designed based on the examination results. It not only plays an important role in helping children to study in the examination, but also enables children to form a good thinking habit. This thinking habit will have an important impact on children's growth and important links in life such as social interaction, cooperation and interest in addition to subject study. The cultivation of thinking ability should jump out of subjects, exams and achievements. "
而这对母女，为了保有属于自己的男人，害怕殷雄落入其他的女人手中，总是费尽心思、拿出自己毕生压箱宝的绝活、用尽手段把殷雄一次又一次的抓回来，这样的一物克一物的食物链剧情，纠葛形成了40集具有质感的时装喜剧。
2. Os.getcwd ()--Gets the current working directory.
We ran counter to each other and ended up in the same way.
Public class ProxyTest {
Law of Demeter (LoD) is also called Least Knowledge Principle (LKP), which means that an object should know as little as possible about other objects. In other words, a module or object should interact with other entities as little as possible, making the system functional modules relatively independent, so that when a module is modified, the fewer modules will be affected and the easier it will be to expand.
在社交媒体时代，这部令人大开眼界的纪录片审视了美国“假新闻”现象的兴起以及造谣、阴谋论和假新闻对普通公民的影响。这部影片聚焦了近年来几则具有现实世界影响的高调编造新闻，包括声名狼藉的“比萨门”案、影响2016年总统大选的造谣活动、玉盔阴谋等。这部纪录片通过独家采访和采访各种专家，以及传播者和误导目标，揭示了后真相文化如何成为全球信息环境中日益危险的一部分。
反刚明而错用之，谓长生可得，而一意玄修。
Lins Concubine 03
3. Take the Sagittarius and the Arrow of Punishment as examples: Attack the King: Sagittarius Life (Gold) Sagittarius Damage (Gold) Sagittarius Basic Life (Red) Sagittarius Basic Attack (Red) Attack King: Night Shadow Life (Gold) Night Shadow Damage (Gold) Night Shadow Basic Life (Red) Night Shadow Basic Attack (Red) Analysis; First of all, we should know what is the basic value for Sagittarius to study 7 stars [attack 5433 health 44505] It is not difficult to see, For priority Sagittarius basic life and Sagittarius basic attacks, their attributes come quickly, that is to say, Red King > Golden King meat shield type Sagittarius, resisting the firepower of the defense tower is the first priority, so priority is given to Sagittarius life and Sagittarius basic life. Attacks overflow, and life kings should be the first choice. The arrow of punishment and the horse are on the rise to a life bonus king. It is worth noting that the rise does not mean that attacking kings will not do it. Only when the stars can be raised and the resources are limited, the life-like kings will be given priority.
