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.
2. Mathematical period: For a function f (x), if there is a non-zero constant T, so that when x takes every value in the domain, there is f (x + T) = f (x), then the function f (x) is called a periodic function. The nonzero constant T is called the period of this function.
为争夺悬骨星的主宰权，龙、灵两族争战不休。龙族首领千浔为保族人签下《悬骨册》与灵族结束千年厮杀。然而两族相安不过数百年最近却又战火再起。
In fact, content-based products are not a very typical division method. I also spent some time summarizing and refining this sharing, which was not detailed due to space constraints. If you go down the line, it is estimated that it will take 3-4 hours.
另外，责令刑部限日查清美味斋掌柜和小二之死，查明后，严惩不贷。
他宁愿弟弟惹下风流债，也不愿已经过世的老爹有半点不是。
南雀军死了七人，只有一人逃走，他还中了秦淼一剑，怕是回去也活不常。
想要上前拦阻，似乎又觉得不妥。
本片为张彻导演，并与倪匡联合编剧，由郭追、江生、鹿峰及龙天翔等主演。故事描述‘神鹰堂’堂主以向‘铁旗门’陪罪为辞，邀‘铁旗门’门主铁麟偕弟子往总坛喝酒，铁麟认为当中有诈，不宜前往，但大弟子曹风（鹿峰饰）力言将计就计，若彼等有所行动，就乘机将他们消灭。‘神鹰堂’果然十面埋伏，铁等将敌人逐一歼灭；惟铁竟在混乱中遇害，郤未知死于谁手……
《后罗曼史》讲述的是在相机演技工作站遇到的4名戏剧电影系学生在复杂的关系中互相隐瞒真实身份展开复仇的故事。
英国广播公司（BBC）制片厂喜剧主管乔希•科尔（Josh Cole）表示：“里斯和史蒂夫继续以越来越壮观和恐怖的方式创造和打破喜剧的所有规则，我们很高兴BBC给了我们机会再制作两部连续剧。套用这部剧本身的话来说，自从那只逃走的母牛之后，就再也没有过如此激动的场面了。“9号里面万岁！”
该剧讲述了北京女孩朱侏，因父亲老朱在一次误审中被警察何欣所抓，从而与何欣认识并相爱的都市家庭情感故事。
该剧改编自漫画，将聚焦媳妇过渡期，主要讲述与平凡的上班族兼大学同窗结婚的女人作为媳妇与婆家人相遇后经历的苦恼故事。
誓要一统三界、凌驾仙神之上的秦始皇……我靠。
Create multiple instances representing different users and call the above two methods for each instance.
本剧将从延安杨家岭一个平和慷懒的早晨开始。而远方的上海此时正值梅雨，阴沉的天穹下，一个巨大的阴谋正在漩开，这个阴谋注定要惊扰零号平静的生活，他从开始就是为此种非常事态设下的伏子，这是他的宿命。阴雨绵绵的上海，地下党总部屡遭中统的袭击。站长卢戡接到警讯时命报务韩筱向延安告急，可一向忠实可靠的刘仲达却一枪轰在韩筱的头上。卢戡此时才看清刘仲达奸细的身份。刘仲达代号蟠龙，是和中统上海站站长沧海并重的中统干将。逃出来的只有卢戡拿命护着的曹姓男子，和他忠诚的护卫钉子。钉子重伤，曹姓男子把钉子藏好，回到总部。军统发觉不对开始砸门，曹姓男子给延安发出警报，报毕后拿出一个手榴弹。终于砸开门时，电台爆炸了。延安，小学老师李文鼎将就此结束，一个叫曹烈云的人将现身于世，一个蛰伏的红色特工将要启封。经历浩劫的上海地下党已经完全失去了就地重建的可能。当初议定的重建计划是一批交通员同时出动，有虚有实，虚者为实者的掩护――发给他的密码是假的。李文鼎已随时准备做好应付各种可能性，即使作为一颗用作消耗的棋子。李文鼎不存在了
