本一a和本二的区别

When a client accesses a server's web service, The client sends a message to the network card, The tcp/ip stack is part of the kernel, Therefore, the client information is transferred to the web service in user space through the kernel's TCP protocol, At this time, the destination destination of the client message is on the socket (IP: Port) that the web service is listening for. When a web service needs to respond to a client request, The destination destination of the response message sent by the web service is the client, At this time, The IP and port that the web service listens on becomes the origin instead, As we said, Netfilter is the real firewall, It is part of the kernel, Therefore, if we want the firewall to achieve the goal of "fire prevention", You need to set up checkpoints in the kernel. All incoming and outgoing messages have to pass through these checkpoints. After checking, those that meet the release conditions can be released, while those that meet the blocking conditions need to be blocked. As a result, input checkpoints and output checkpoints appear. These checkpoints are not called "checkpoints" but "chains" in iptables.有一次小马被人揍打，对方是一个经常被他欺负的学生找来的拳击手。受到打击的小马开始学习拳击，想要争口气。新志也跟着学，没想到他却更有练拳的天分。后来小马放弃学拳，加入了黑帮当小弟。而新志却发奋练习，并有所收获。等待他们的又将是什么样的未来呢？某市地产界巨商匡宗元在豪宅被杀。女商人卜绣文成为重大嫌疑人。刑警在扑朔迷离的案情调查中，了解到一段令人匪夷所思的故事……卜是商界女强人，丈夫夏是大学教授。二人因经济地位日渐悬殊而感情疏远。所幸这个家庭还有一个冰雪聪明的可爱女儿早早。匡被卜高贵典雅的气质所吸引，对卜展开求爱攻势，但遭到拒绝。匡设圈套控制卜的房地产开发计划。卜被迫同意与匡合作。Effect after dryingCreate multiple product objects in multiple product families. Q: How? A: Each specific factory creates multiple product objects in a product family, and multiple specific factories can create multiple objects in multiple product families.秦淼不好意思地笑了，因见他脸色不好，忙问怎么了，又要帮他号脉查看。黛比·瑞恩(《保姆杰茜》)主演Netflix剧集《永不满足》宣布续订第2季。