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A war of 0 and 1Suppose the attacker is in an "interconnected" network (e.g. An Autonomous system? System), whose ISP restricts the input and output filtering of the attacker's network traffic, will be able to prevent this spoofing attack-if this method can be deployed to the correct location by the organization. This defense method of traffic input and output filtering will restrict some legitimate communications, such as the mobile IP triangular routing operation mode, so it cannot be widely deployed. IP Security Protocol (IPsec) also provides an excellent way to resist spoofing packets, but this protocol cannot be used due to deployment restrictions. Since it is usually impossible for the server side to require the ISP of the link initiator to implement address filtering or require it to use IP security protocols, more complex solutions are needed to resist this spoofing attack disguised as multiple addresses, which will be discussed later.所以，咱们要去京城找。这一日下午，他还是去了。There is an eccentric person in our class. His name is Lin Nian. He is famous in the class and even in the whole school. Our class often calls him "Little BB".他叉开双腿，如铁柱般钉在大堂中央，对着众将官道：人家胡家一句话，我姑姑张家就被抄了。只有这样，他们才能忙碌起来，无暇顾及自己。