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In the process of forging rst messages, the ip address and port number of the server side are known. Attackers also need to try to obtain the ip address and port number of the client side and make the sequence of rst messages within the receiving window of the server. If the attacker and the attacker are in the same intranet, this information can be obtained through spoofing and sniffing.(four) to verify the medical security valid certificates of the insured and the medical assistance object, so as to ensure that the certificates are consistent;More reasonable than the 10,000-hour theory! If you want to be an expert in any industry, you need to practice deliberately!该剧讲述了为了复仇而赌上一切的检察官，和因为和财阀结婚而毁了人生的女明星之间的激情爱情故事。葫芦哥哥……叫了一半就停了，她长大嘴巴吃惊地望着门口的胡镇，以及另一个面容清冷的公子，锦袍玉带，狐裘披风，看上去就是个权贵子弟，正眼不眨地凝视着她，深邃的眼眸中泛起层层涟漪。The biggest difference between the two is that the MAC OS system is not started in DFU mode, and itunes cannot decide whether the iPhone recovery process is interrupted, because the system is not started and related services cannot be enabled. It is said that the iPhone recovered in DFU mode is more thorough, and I have not compared it, so I will not make a conclusion here.If I were to implement a pizza ordering system, I would definitely write the code like this, because this kind of code can be written subconsciously without consuming our brains. However, take a closer look at this code: the purpose of this method is to order pizza. However, the code for ordering pizza also needs knowledge about the production of pizza. This method must know all pizza. Worse still, if the types of pizza are to be expanded or pizza with poor sales volume are to be deleted in the future, then the code for ordering pizza will be modified. It looks very bad and should be revised. Our first step must be to separate the code for producing Pizza from the code for ordering pizza, because you should not let the code for ordering Pizza know the logic for producing pizza, but should hand over the logic for producing Pizza to a special type. In this way, we can cope with future changes-if we want to add or delete pizza, we can directly modify the producer of pizza without affecting the logic of ordering pizza.