(The specific introduction of ARP fraud principle We all know that in the network, if a host A wants to send data to the solution host B, no matter whether the host B is in the local network segment or in the remote network, four requirements are necessary in the data packets sent by these requirements. Less addresses, that is the source IP address and source MAC address, as well as the scheme IP address and scheme MAC address, when host B is encapsulating the data packet~)