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打开淋浴，哗哗，冰冷的水淋下来，但似乎依旧浇灭不了她心中的火热。SYN attack is a kind of DOS attack. It takes advantage of TCP protocol defects and consumes CPU and memory resources by sending a large number of semi-connection requests. SYN attacks can not only affect hosts, but also harm network systems such as routers and firewalls. In fact, SYN attacks can be implemented as long as these systems turn on TCP services no matter what systems are targeted. As can be seen from the above figure, the server receives the connection request (syn=j), adds this information to the unconnected queue, and sends the request packet to the client (syn=k, ack=j+1), then enters the SYN_RECV state. When the server does not receive an acknowledgement packet from the client, it retransmits the request packet and does not delete this entry from the non-connection queue until the timeout. With IP spoofing, SYN attacks can achieve good results, Typically, clients forge a large number of non-existent IP addresses in a short period of time, SYN packets are continuously sent to the server, and the server replies to the confirmation packets and waits for the confirmation of the customer. Since the source address does not exist, the server needs to continuously resend until it timeout. These forged SYN packets will occupy the unconnected queue for a long time, normal SYN requests will be discarded, the target system will run slowly, and in serious cases, the network will be blocked or even the system will be paralyzed.　　莱特曼博士供职于一家私人机构，该机构专事微表情的研究，对谎言的判定具有绝对的权威性。当FBI、警察或者民间机构遇到悬而未决的问题之时，便是莱特曼博士及其团队大展身手的好时候。他们凭借丰富的经验和谨慎的作风戳穿一个又一个谎言，将事实真相还原。在他们面前，任何说谎者都无处遁形。这一宣布是在今晚（2020年3月9日星期一）英国广播公司第二频道晚上10点播出的第五辑大结局之前宣布的。2. How to choose when non-graduation shields, 10% critical strikes and 15% scourge injuries cannot be produced at the same time.If we return to reality, No matter what kind of love, After getting married, they are all faced with daily necessities, From two people to two families, Needs to work hard, many examples around, from an intellectual woman to dissatisfied housewife, to that step, who will mention the love of that year, many people said that after the passion retreated, love can be transformed into family affection is the best state, but this is not the marriage state I want, always feel that life needs love, surprise and emotion.最后便是诚心感谢大家，虽然更新少了，但是每天的打赏、推荐票、收藏却没有少。