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炎热的夏天，让他们忍不住有种刺骨的寒意。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.厨艺满天下的孤女方一勺自小就孤苦无依，但是却有一手好厨艺，因为替人烧菜却遭到暗算，不得不代嫁给知府家的恶霸少爷沈勇。生性乐观、汤圆脸、大眼睛却耐看的方一勺对诗词歌赋却一窍不通，生气起来哪怕是一根擀面杖也能舞得虎虎生风。她厨艺精湛并略懂武艺，被骗嫁入沈家，颇得公公婆婆喜爱。真可说是一物降一物，沈勇不情不愿的娶了方一勺，却渐渐喜欢上这个不懂诗书但却能陪自己打架喝酒划拳的冒牌才女，更何况这个小丫头还固执的认定他沈勇是个好人，方一勺也华丽上演了训夫记。精诚所至金石为开，浪子终是要回头的，在方一勺的陪伴下，沈勇终有所成……民国时期，大少爷柳愉生在家道中落后，以“教师”一职实现自己的理想与抱负，老同学周耀华的突然归国却打乱了他的生活，紧跟而来的是一次次“艰难抉择”该剧展现了动荡年代里热血青年为国奔走的豪情，更有与曾经同窗好友行走在情感和欺骗刀锋的情感纠结。若是关中百姓有人站在我们这边，想必会事半功倍。现在北方的事情已经让项羽疲于应付了，若是南方再开战，只怕西楚国也承受不起。白县令那样的好官，怎会是坏人呢？他要是坏人，当年找回那个孩子，还不把他弄死了，还养着？他媳妇也糊涂，道：可是按女将军说的，他找回来的不是真的王爷兄弟，真的顺河跑了。