| http://www.w3.org/ns/prov#value | - First, FIG. 20 shows a process flow of the packet controller 101. [0120] (S20) When a packet is received, the packet controller 101 extracts its IP header information (see FIG. 56). [0121] (S21) From the destination address and port number contained in the extracted IP header, the packet controller 101 determines whether the packet is a data packet or a protocol packet.
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