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).
张良听在耳中冷冷一笑，不用详细解释，他知道是怎么一回事。
Game Screenshot
有人就窃笑，说亏得秦枫认祖归宗了，皇上又封他为亲王，否则的话，这嫁女可就寒碜了，还不让京城人笑话死。
2014年，突然出现的外星人，要求人类进行“交易”。
不等旁人说话，王穷首先反对。
In fact, the truth...
安娜·肯德里克加盟克里斯多夫·莫利斯([四头狮子])执导的未定名喜剧。卡司包括凯万·诺瓦克、丹尼尔·布鲁克斯、丹尼斯·欧哈拉等。新片剧情目前暂未透露，据悉肯德里克在片场以FBI探员造型亮相。See-Saw Films、Archer Gray Productions联合制作。影片已在佛罗里达、多米尼加开机拍摄。
Later, the battle was the same, and it was fought several times over and over again. The ammunition consumed most of the time. The front of the position was covered with enemy bodies. I remember that after resisting the fifth attack, the Vietnamese army stopped there. It did not launch any new attack for a long time. Until more than 3 pm, the Vietnamese army actually "let dogs bite"! I was so impressed by the way the dog looked, The appearance is about the same as that of the domestic dog in my hometown. But there was no hair all over her body. The two eyes are still very far apart, The key is to run very fast. There was some grass in front of the position, and craters were everywhere bombed by the subsequent shelling. The 152-meter shell was a large crater with a diameter of 5 or 6 meters. However, this kind of "dog" can easily cross one with one jump, and there is no need to slow down in continuous jumping. The speed of impact is definitely not comparable to that of human beings. "
后者，章邯死守在淮水沿线，很难突破。
苏岸叹道：若是俊哥在此就好了，他一定更有经验一些。
藏在这间屋子里的并不止芭芭拉和本两人，汤姆（Keith Wayne 饰）、朱迪（Judith Ridley 饰）、哈里（Karl Hardman 饰）和海伦（Kyra Schon 饰）等人纷纷加入了避难的队伍，面对屋外越来越多的丧尸，众人知道，如果不能主动出击，那么只有死路一条。搜集仅有的武器，封锁门窗，在这一危急时刻，每一个人都在为了生存而战斗着。
Anhui Province
这尼玛都是什么情节？那个林平之，已经让郑武越看越不顺眼了。
少年杨家将的故事以杨家将归宋为起点。北汉被灭后，遗臣杨业为宋太宗器重赏识，杨业为了苍生福祉，以及报答太宗的知遇之恩，带领七子效忠宋室，力抗辽军入侵，写下名扬天下的忠义史话。
2000年出生的福本莉子，将昭和时代的名曲在令和中复苏
敬文不知所措，但舅舅却施展法术，证明自己的确去过另一个时空。敬文决定将舅舅接回公寓同住，一方面是没有其他亲戚肯帮忙，一方式是他觉得可以利用舅舅的能力来赚钱。
