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.
CCTV-10科教频道首档融媒体科技日播栏目，每集十分钟，让观众了解三个科技点。意在“展示科技新创意，新产品，新发明”，让百姓在享受科技之美的同时，了解科技内核，体验科技发展对人类生活的切实改变，向观众展现科技的魅力。 选题方向，有科技感，流行时尚，贴近百姓生活。内容上，科技短片实现场景多样化、视觉自由度最大化和身临其境的体验感。通过体验者的讲解和体验演示，以短、频、快的方式，生动、有趣、新奇的画面语言，和最前沿、最有科技感的动画和电视手段，展现科技的功能、科学原理和生活中的实际应用感受。以技术科学为王、切实提高百姓生活质量的理念，让全民懂科学、知科技、爱科技。
上世纪八十年代，陆秉峥与陈有德带领的考古队在前往昆仑山考察中途遭遇沙尘暴，意外掉进尼雅女王的地陵，却发现位于地下的一个巨大磁场迷宫。在遭遇了巨型蜘蛛与毒蝎群等袭击之后，全体队员阵亡，只有陈有德逃了回来，而陈有德却不知所踪。七年之后，陆秉峥之子陆九逸带领众人踏入茫茫沙漠，寻找尼雅古国，试图找回父亲的踪迹，可等待他们的却是各种诡异的未解之谜……
2019年5月，几十位作家来到山西汾阳的一个小村庄，他们在这里谈论乡村与城市，文学与现实。影片以此为序曲，交响乐般地以18个章节讲述出1949年以来的中国往事。出生于上世纪50年代、60年代和70年代的三位作家贾平凹、余华和梁鸿成为影片最重要的叙述者，他们与已故作家马烽的女儿一起，重新注视了社会变迁中的个人与家庭，让影片成为一部跨度长达70年的中国心灵史。
因为今年春天导入的“校园律师制度”，新人律师田口章太郎（神木隆之介）被律师事务所的老板高城（南果步）派遣到青叶第一中学。监护人水岛（堀内敬子）正在向班主任望月（岸井雪乃）抗议，因为自己的女儿受到了体罚。田口说，“你现在的行为是强行妨碍营业”，赶走了监护人。校长仓守（小堺一机）因为大事化小和平解决心情很好，但是教务主任三浦（田边诚一）对田口的做法提出反对。几天后，体罚问题发展成了谁也没想到的状态…
队长马如龙（成龙）执行公务时遭人陷害，愤而辞职。海盗头目罗三炮（狄威）抓走官兵家眷做人质，当局决定利用内线周永龄从中调停。因为早知周永龄与海盗勾结，马如龙自告奋勇拯救人质，他重组水师，制定了A计划，期望通过与上司洪天赐（元彪）及好兄弟卓一飞（洪金宝）作里应外合，将海盗一网打尽。
梅仁信是个性格孤僻的怪人，很难相处，从不与人方便。梅仁信之所以如此不近人情，原来当年他的妻子昏倒街头，可是竟然无人伸出援手，以致错过拯救的黄金时间，含恨而终。当年的梅仁信，是名教练，在球坛上可说是叱咤风云，计谋百出，可是由于妻子骤然离世，让他内疚万分，认为忽略及亏欠了她，以致无法原谅自己，从此就隐姓埋名，远离球场。
This method requires the salesman to directly target the customer's main purchasing motivation, directly sell to him, beat him off guard, and then "take advantage of the situation" to persuade him in detail. Please look at the following scene: the doorbell rang and a well-dressed man stood on the steps of the gate. When the master opened the door, the man asked, "Is there a high-grade food mixer in the house? "The man was shocked. This sudden question left the host at a loss as to how to answer. He turned to discuss with his wife, who was a little embarrassed but curious and replied, "We have a food mixer in our house, but it is not particularly advanced. "The salesman replied," I have a senior one here. "He said, and took out a high-grade food blender from his bag. Then, it goes without saying that the couple accepted his promotion. If the salesman changes his way of speaking, he will say, "I am a salesman of X Company. I came to ask if you are willing to buy a new food mixer. "Do you think about the marketing effect of this kind of talk?
还有，在下虽然不敢自夸，却也不会妄自菲薄，这些年，赖师傅当年教导，也颇挣得些薄名，像胡老大这样的重症，倒也治愈过不少。
白胜祖(金贤重)：不仅有着让女生都羡慕的完美外表，而且IQ超高，学习成绩全校第一，非常有运动细胞，财力也是超凡，只是这位让人感叹命运不公平的男生却是个做任何事都不带笑容，性格枯燥无味的冷淡男生。 吴荷妮(郑素敏)：与白胜祖同校的笨拙专业户，却有着一颗善良，乐于助人的心。自从对白胜祖一见钟情后吴荷妮发奋要改写自己倒数的成绩，并为了感动他做了一件又一件傻事，最终赢得了他的心。
《侏罗纪公园》。恐龙，恐龙，到处都是恐龙！天呐！网络世界里，真的没有俊男靓女了吗？贾丽投身于轰轰烈烈的网恋事业不能自拔。他，就是“孤独的手”……
当一所新出租的房子搬走后，会遇到健忘症幽灵。营救发生在死亡49天后。让我们一起来看看他能否逃脱的结论。
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庞取义拍着胸脯道，你来了，就把这儿当家，咱们没有读书人那一套东西，什么登门拜访还要先递帖子之类的，统统没有。
大明万历年间，江南某地治安混乱、匪患猖獗。当地盗贼首领“苏先生”被当地官府追查多年，却未发现丝毫线索，行踪神秘。新任知府左宗元为给在京城任御史的岳父庆贺生辰，委托威武镖局总镖头马一刀押送价值连城的紫玉观音去往京城。 马一刀带着镖局四大高手去往京城，殊不知他押镖的消息不胫而走、传遍江湖。一时间，各路人马跃跃欲试，打算在路上伺机夺镖。几人行至飞云渡，路遇大暴雨，无奈只好入住金家客栈，没想到各路高手早已探知他们的行踪，并在客栈里埋伏好，只等他们上钩，而这些高手里面究竟谁才是“苏先生”？
Considering performance, the whole program only needs to create an instance once, so performance will not have any impact.
至此，郑家人总算到家了，郑青木父子却没有立即进院，而是跟张家祖孙，并赵三一起，往周家去拜望周夫子。
那就是，要成为闪闪发光的“学园偶像”！
Due to the large number of test data, the landlord only selects a rocket minimum value (Figure 1), a poison arrow minimum value (Figure 2) and a poison arrow median value (Figure 3) for explanation. Most of the rocket damage tested by the landlord was in the early 15W 's, while most of the poison arrow damage was about 14W' s. 15/14-1 = 7.14%. At this addition (30% +40% +100% +20% * 2) = 210%. 210% * 7.14% is about 15%. This is equivalent to flame being born 15% higher than virulence. Since it is impossible to know how much or not this ratio fluctuates with skills, the accurate value cannot be estimated. For the bow, the final poison damage is 230% (20% more for the auxiliary weapon), so even if it does not fluctuate with the skill, it will get a highly toxic damage entry slightly higher than 15%. The value of 15% can be used as a reference.
