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In TCP implementation, when receiving the SYN request from the client, the server needs to reply the SYN + ACK packet to the client, and the client also needs to send the confirmation packet to the server. Usually, the initial serial number of the server is calculated by the server according to certain rules or adopts random numbers. However, in SYN cookies, the initial serial number of the server is obtained by hash operation and encryption of the client IP address, client port, server IP address, server port and other security values, which is called cookie. When the server suffers from SYN attack and makes the backlog queue full, the server does not reject the new SYN request, but replies the cookie (SYN serial number of the reply packet) to the client. If it receives the ACK packet from the client, the server subtracts 1 from the ACK serial number of the client to obtain the cookie comparison value, and performs a hash operation on the above elements to see if it is equal to the cookie. If equal, complete the three-way handshake directly (Note: At this time, you don't need to check whether this connection belongs to the backlog queue).从小就期待着去找妈妈和妹妹的苏盼，带着父亲的临终嘱托，踏上了加拿大的寻亲路。看望多年不见的妈妈安娜和孪生妹妹苏瞳。三人最初的相处十分尴尬。莫氏企业因童雪父亲而破产，莫父猝死。商界巨头慕家以救莫家家业为由迫莫绍谦与慕咏飞商业联姻。结婚当夜，慕咏飞尖酸刻薄的谩骂逼得莫绍谦与其分居。分居十年中，莫绍谦几番要求离婚未遂，两人婚姻早已事实消亡。莫绍谦偶遇父母双亡的童雪，一见倾心。但当其得知童雪身份，设计将她困在身边。谁知相处中，莫绍谦逐渐爱上童雪。终于，莫绍谦发现当年莫家危难是慕咏飞一手策划，反击慕家。关键时刻，童雪好友家中出现经济问题，童雪求助莫。莫绍谦为帮助童雪，毅然动用巨资，令其与慕家决战失利。慕咏飞被莫绍谦对童雪的真爱感动而觉悟放手。莫绍谦也因为伤害过童雪心存歉疚去自首。童雪决定出国，在机场发现莫绍谦遗留手机上发给她的示爱短信，终于知道了莫的心意…《风云战国之列国》是由腾讯视频出品，企鹅影视和上造影视联合制作的国内首档剧情式历史纪录片。纪录片以齐、楚、燕、韩、赵、魏、秦战国七雄的英雄人物、国家命运为线索，通过实景还原和演技派演员演绎的全新剧情式呈现方式，探索战国时期的六国兴衰史以及秦王朝一统天下背后更深层的秘密，为广大观众再现2200多年前那一段波澜壮阔的历史。本作品描绘了京都府警本部新设立的“网络综合犯罪系”的活跃表现。以主任安洛一诚为首的团队，利用网络分析和职业归档等最先进的机器和技术，对抗逼近身边的网络犯罪。两年前，当红女演员舒星因参加一场晚宴被陷害杀人，舆论瞬间倾倒，她跌落深渊。蛰伏两年，她霸气复出，发誓一定要找回当年的真相，让所有做过错事的人都受到惩罚！随着计划展开，凌云、光月、苏雨、莫莉等人隐藏的秘密逐渐浮现，前男友顾晨和现男友景明也被卷入其中.......面对乱象丛生的复杂情感，众人会如何完成自己的救赎？