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Some people ask me, don't I envy my family for celebrating the New Year together? I want to say that people who have not eaten chocolate will never know how delicious it is and will not miss it.众人心头一震，尹旭、蒲俊、韩信、苏岸四人迅速交换意见，得出结论。Meemaw和Sturgis试图让Sheldon和另一个神童（Mckenna Grace）成为朋友，这让Sheldon惊慌失措。[1]《纯真的年代》主要讲叙了1978年，在东北插队的北京知青 “厉家驹”逃往广州避难时，结识了“吉祥里”里的“阿静”和 “洗广伟”。在经历了一番不打不相识的波折之后，众人都来到了号称“天堂围”的知青点。那里却没有一丝天堂的意思，大家都商量着逃港，却屡屡不成功。直到全国恢复高考，家驹等人考上了大学，阿静也成了小个体户商贩，成了第一批“吃螃蟹”的人。洗广伟历经各种骗局，也走了出来，在改革开放的初期，挣到了人生第一桶金。已经做了公务员的厉家驹不满体制内的人浮于事，辞掉公职投身于改革开放的大潮中，下海经商，可就在他们的生活逐渐好转时，一场灾难又降临在了他们面前，他们将何去何从。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.//Set the second state