In the SYN segment using the TCP connection initialization sequence number has the value 0, and SYN bits is 1 indicates this is the segment sequence number value. the fact SYN initiates a different number 0, but Wireshark put this value to 0 to make the mold count the following sequence number.The command netstat-a allows to track the current status of TCP connections on a host. For example, to determine the port is listening, use the open command trojan: netstat-an | findstr
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