(In order to better analyze the port, it is better to use the software tcpview. The software is small and green and does not need to be installed. The font is small when it is displayed for the first time. In "options" -& amp; gt; Increase the font size in "font". The data displayed by tcpview is dynamic. The localaddress in Figure 3 shows which port is open on the machine (the number after the: sign). Tcpview can see which port is initiated by which program. As can be seen from Figure 3, ports 445, 139, 1025, 135 and 5000 are open, ports 445 and 139 are initiated by system, and ports 135 are initiated by svchost.
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