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一个漂亮温和的招待小姐把陈启引进茶馆。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).(2) a tail lamp;说话间，二人告辞离去。刘大胖子道：啥矫情。汉城一间中学，金相奕与郑惟真是班中同学公认的一双恋人，但风平浪静的爱情生活由一名转校生姜俊相的出现而有所改变。姜的出现令郑认定他才是自己的初恋对象，在不知不觉两人更热恋起来。后来姜发觉金、郑曾是一对恋人而心中不是味儿。圣诞节来临姜与郑约定见面。此时姜的母亲为阻止姜与生父相认，要姜移居到美国，在离开韩国之前，姜赶往约定的地方与郑见面，但不幸遇上车祸，母在所有人面前说出姜地死讯，郑悲痛欲绝。10年后，姜母与他在美国再婚的丈夫回到韩国。当年称在车祸中丧生的姜亦有出现，并改名为李民享，在一次甄选会议上郑见到姜，但姜竟然不认识眼前的郑，究竟是不想相认还是另有别情……