Know the principle + can change the model details man: read the paper, read the paper, read the paper! Read source code read source code read source code! The source code reading here is not limited to reading the source code of one framework. You can look at other excellent frameworks. For the implementation mechanism of the same layer and the same function, you can think more, summarize more and write more. After a long time, there will definitely be gains. The purpose of reading the paper is to directly obtain the original author's thoughts, avoiding obtaining second-hand thoughts from blog interpretation of the paper. After all, everyone's understanding is different, and it is not necessarily right. Read it first, then look at other understandings, and discuss with Daniel more, thus broadening the thinking. 原来，高阳偷窥到的美女叫米佳，是隔壁班的转学生。高阳大失所望，新同桌叶晓文还是个怪咖：他不言不语，对自己的过往只字不提；他坚持跟高阳换座位，坐在外面听课；作为斌哥的孩子，高阳一直备受老师宠幸，而叶晓文一来就成了众老师的重点关照对象...更让高阳受打击的是，女神米佳似乎与叶晓文很要好，一下课就来找他说话，高阳跟叶晓文打听米佳，他却说俩人不熟。体育课上，高阳准备给“怪咖”叶晓文一个下马威，却反被叶晓文弄的出了洋相。高阳扬言，他要和这个转学生势不两立！然而当高阳放学回家，却看到叶晓文围着围裙在家里做饭。父亲高斌告诉高阳，从今天开始，叶晓文就要在他家生活了，他要把叶晓文当成亲兄弟一样对待，于是，鸡飞狗跳的群居生活即将开始……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.李子勇Thomas（林保怡／陈健朗饰）出生贫穷，年轻时为赚取母亲（张慧仪饰）的医药费，拼命打工赚钱，认识了同在茶餐厅打工的少女方小薇Sammy（周家怡／谈善言饰），自此变成好朋友。茶餐厅老板（秦沛／艾威饰）分配Thomas到比利时进行走私名表的生意，因一个重大的错误在比利时留了二十年，并结识了出生入死的红颜知己Judy（李思函饰）。四年前，Thomas返回香港跟Sammy一起开办餐厅，并重遇在比利时结识，何乐儿Joyce（卫诗雅／杨偲泳饰），二人一拍即合，很快便走在一起。Thomas及后发现Joyce与一名为胡启源（陈奂仁／黄定谦饰）亦已拍拖八年，并与一名人妻梁淑媛Catherine（伍咏薇饰）育成子（岑珈其饰）。六人关系扑朔迷离。命运让他们的人生交错，相遇，相识，相处，相分到重遇，纠缠一辈子的爱恨，换来一声叹息。China has basically formed a relatively complete industrial chain structure and has continuously improved its materials, devices, systems, networks and other aspects. There are 6,000 kinds of independent products. Three major sensor production bases have been established in China, namely, Anhui Base, Shaanxi Base and Heilongjiang Base. The government has put forward guidelines for accelerating the development of the domestic sensor industry. The future sensor development will improve towards intelligence.故事发生在2018年的上海，讲述了生活在浦东新区的顾家，四代人在置换房子的过程中所经历的生活剧变。20
