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).
Eliminate the coupling between the sender of the request (the company that needs to outsource the project) and the receiver (the outsourcing company).
初一新生贺翔一直梦想自己是个厉害的漂移车赛车手，可是生活中他却性格内向，缺乏自信，原来，他爸爸贺天佑严令禁止他接触任何与漂移竞技赛相关的东西，他心中一直很纠结。”在应战过程中险些被对方的赛车撞下山崖，危急关头，贺翔挺身而出……
时间是第一次拉达姆之战过后十年，人类已掌握铁加曼系统，并以第一次拉达姆之战中被素体化的人类为基础，着手重建铁加曼系统。而拉达姆不甘心上次的失败，派遣大量舰队驶向地球，在太阳系外围与地球防卫军展开激战。同时，为了对抗新的敌人，宇宙骑士队重组，并着手制造新的铁加曼。第二部中，由美，大卫，娜塔沙作为新的主角登场，而亚纪则成为新的宇宙骑士队队长，我们第一部的英雄D-BOY作为宇宙骑士队的灵魂，为人所知的仅是十年前一战与月球基地同时消失于天际这一残酷的事实。而故事即由此展开。
BIM technology can add time dimension to three-dimensional space model to carry out 4D simulation construction, which is conducive to the optimization of construction period. Based on BIM technology, 4D simulation construction can put forward a virtual construction scheme, which can pre-process various possible induced situations in the construction. The application of BIM technology in the construction stage can reduce possible errors in the process of information transmission and reduce rework.
让小辈们先过去，也好搭个伴
主要讲述了叛逆校霸意外穿书变孱弱少年，机缘巧合下被绑定“学霸解锁超能力系统”，通过努力学习，获得超能力加持，让自身不断强大的同时，结交挚友，重新找到自己人生意义的励志校园故事。
正愣着，就见院子里出来个仆妇，对着那曾鹏板脸道：这是夫人侄儿。
张槐也道：不错。
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But I will never abandon the pit, to trust the landlord
其次——云影震惊：还有其次？小葱点头：其次，师伯跟他说，要心存善念，自然正气凛然，鬼魅魍魉不敢近身。
From: https://my.oschina.net/u/2963604/blog/1621415
众人往两边退开，让出偌大的空地，高易等人都紧张不已，捏着一把汗。
# Shutter speed #
这是中国首部反映新疆生产建设兵团全景生活的剧作，真是再现了新疆生产建设兵团风雨沧桑几十年的历史，展现了父子两代开拓者蕴含血泪的生活历程和感情纠葛…… 一九四九年十月一日，中华人民共和国宣告成立，担负解放大西北任务的中国人民解放军第一野战军一兵团官兵誓师河西走廊重镇酒泉，庆祝中华人民共和国成立，同时遵照毛浙东和朱德总司令的命令，进军新疆，要将红旗擂向帕米尔高原，彻底解放全中国。 在内地陕西，农家姑娘柳叶私定终身的情郎陈明义参军走了，临别时两人约定打完仗陈明义就回来结婚。不明就里的柳父将柳叶许配给富家子弟姬元龙，姬家下了迎亲的帖子，柳叶不得不逃婚，踏上了千里寻夫的艰难路程。柳父眼看姬家迎亲在即，而柳叶不见了踪影，怒不可遏。柳叶的双胞妹妹柳月情急之下顶替姐姐嫁给了姬元龙，新婚之夜，大学生姬元龙清新的思想和善解人意的关心让满腹怨气的柳月真心爱上了他。当一对新人高高兴兴回门时，却发现柳父因为失信于姬家而自尽了。 寻找陈明义的柳叶历经艰辛，不幸落入土匪手中，危难之际被剿匪的解放军所救。她向带队的营长
所有的谜团现在都解开了。
遭敌反扑“围剿”失败后，韦拔群到广州。进入广东农讲所学习。后他返回东兰，也建立农讲所，教育、组织农民起来进行革命。
