| http://www.w3.org/ns/prov#value | - The method may further comprise the steps of, if the data packet is a data packet based on the TCP, determiningwhether the filtered data packet, obtained immediately after the primary filtering has been performed, is a SYN packet or an ACK packet, storing the SYN packet or the ACK packet, extracting only a SYN packet or an ACK packet, having the IP address or theport number registered in the step
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