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).
When introducing the competition plan and relevant rules for the second season, Shi Fan, chief director of Charming China City, said that the second season would increase innovation in an all-round way and stress three elements: first, it would emphasize the integration and creation of culture + tourism + city brand; Second, this year more emphasis has been placed on the harmonious relationship between people and cities. Third, the city's profound cultural heritage will be deeply explored again.
安慰，不管用。
这群少年对前途悲观，终日流连迪斯科舞厅、溜冰场，还组成“风暴列车”溜冰队。
许多人暗自摇头，尹旭到底年轻气盛，干嘛这么要强呢？哪怕是找个借口，说自己听错了或者口误也就过去了，宋义还真能穷追猛打，咬着不放？这下倒好，这不是主动授人以柄嘛。
该剧取材于中国特大民营企业横店集团，以横店集团创始人徐文荣和现任总裁徐永安等一批不甘贫困的两代人为创作原型，反映中国农村经济改革的历史变革。
Note: 1 = Excellent 2 = Good 3 = Satisfied
我已经换睡衣了。
ExecuteDispatch
China 18 million 17 million 35 million
在巨大利益的诱惑下，沙加路的前辈曾尝试摸一摸狮子的屁股，在狮子眼皮底下的屯门岛划地盘踞，怎奈狮子微微眯眼一记重拳捶来。
你玩挑拨离间，那咱就来一招釜底抽薪。
In more than a month after the "rebirth", Ellie began to exercise and to find a new job.
日落之时，军报传来——杭州已破。
故事讲述了唐末文宗年间宰相旺涯满门抄斩，两个死里逃生的姐妹多年后以不同身份相遇，并且帮助新帝李炎重振大唐的故事。
跟着碰碰狐一同倾听神秘的星座童话故事，一起了解星座的由来、起源和传说。听碰碰狐讲述星座的小常识，走近古老而有趣的星座世界。
A collection of children's horror stories by R.L. Stine.
As a result, only two years later, house prices doubled. Li Gang was extremely happy: "Fortunately, I bought it." On financial management ability, Li Gang is far above his wife. "I have more than ten years of investment experience, and I know all about complicated financial instruments, and she even asks people if they can guarantee the capital if she buys a bank financial product." Li Gang said.
So you m is the mother spider who produced Echo Knife and Crazy Tomahawk.
"No, the whole waist is broken and people are divided into two parts from the middle." Wang Zeduan said.
