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Prototype mode refers to specifying the type of object to be created by giving a prototype object, and then creating more objects of the same type by copying. The main points of its implementation include:Resource isolation can be regarded as a protective shield for user services. This protective system has extremely powerful data and traffic processing capabilities to filter abnormal traffic and requests for users. For example, for Syn Flood, the shield will respond to Syn Cookie or Syn Reset authentication, filter forged source data packets or attacks of power generation through authentication of data sources, and protect the server from malicious connection erosion. The resource isolation system mainly protects the third and fourth layers of ISO model. The schematic diagram of resource isolation is as follows:"If only my father and mother were here, they would be very surprised to see it!"Facing TCP's three-way handshake protocol, how should attackers launch attacks? The attacker first intentionally initiated a handshake packet. After receiving it, the server puts it into the waiting queue and returns an acknowledgement. Secondly, the attacker will no longer send the third acknowledgement packet, thus the server will make multiple retransmissions (the Linux system configures the number of retransmissions through tcp_synack_retries), consuming a lot of extra overhead, and the waiting queue will be occupied, even the waiting queue will be full, eventually causing the server to be unable to receive the client's request. This is the attack.靠耍小聪明替人出头的小混混戴小龙为了给重病的母亲筹集医疗费，不得不接下一单极具挑战性的困难任务：以卧底的身份潜入一所学校的喜剧班进行秘密破坏行动。然而在社会上游刃有余的戴小龙来到学校却屡遭碰壁，一群不按套路出牌的同学和一个特立独行的老师让戴小龙陷入了意料之外的囧境，戴小龙的任务迟迟没有完成。在与同学们的朝夕相处中，戴小龙渐渐被他们的真诚打动。最终，他放弃了对喜剧班的破坏行动，也重新选择了自己的人生方向……2. Modify the system variable PATHWhen the character receives the "news1" message, let the person return to the starting point again, switch the background to the next, and then repeat the walking cycle. Encountering the edge is the same as the above processing method.