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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.电影讲述了出生于音乐世家的邓紫棋,在家人尤其的熏陶之下,从小热爱音乐、喜爱唱歌。15岁在校园歌唱比赛中展现过人的音乐天赋，并立志成为最优秀的歌手。16岁正式出道，在经历了多年的努力和沉淀,拿下多项音乐大奖，成为唱入红馆最年轻女歌手。2014年邓紫棋参加《我是歌手》后成为亚洲冉冉升起的优秀歌手，成功举办73场世界巡回演唱会。但在人气骤升的同时，压力和非议接踵而来，但她在追求音乐梦想的道路上不惧压力与非议,最终一路逆风飞翔的音乐故事。一位崇尚西方文化、生活模式的29岁英文老师润子（石原里美饰），梦想着自己将来在国外工作、生活，但此时却因为家人的坚持，而被迫去相亲。更令人意外的是，对方竟然是个和尚。对于润子的工作、梦想，和尚星川高岭（山下智久饰）一直抱持着否定的态度，究竟他只是单纯的爱泼冷水，还是有其他理由。连性观念也无法有所共识的两人，彷佛处于两个不同的世界，而这之间又会擦出怎样的火花　Elizabeth Thatcher, a young school teacher from a wealthy Eastern family, migrates from the big city to teach school in a small coal mining town in the west.秦旷却听呆了，怎么几句话的工夫，虎王寨就要解散了？待听到林聪邀香儿去丰县落户，他霍然站起身，对香儿道：香儿妹妹，你还是跟我去京城吧。丧偶多年的罗建军又当爹又当妈的把儿子带到了十六岁，孩子大了，他也老了，幸运的是在四十大几竟然遇到了一个与自己情投意合的女人江欣，他们彼此都认为对方是能让自己后半辈子幸福的人。顶着双方家人的反对，勇敢又满怀信心地组成了一个新家庭。然而，从他俩拿结婚证的那一天起，这个家庭就不太平：江欣的儿子肖兵不喜欢这个继父，为拆散这个新家不断惹事生非；婚后不久，江欣被查出到了癌症末期；肖兵间接害得罗建军的儿子进了少管所，罗建军的老母对肖兵深恶痛绝、誓不两立。江欣去世后，出于一个男人对责任和承诺的坚守，罗建军承担起视他为仇敌的继子的抚养责任，其间有过灰心、失望，有过放弃动摇，最终以他的大爱融化了肖兵内心的坚冰。这对半路父子建立起真正的父子之情。