(fport is an effective applet, which can see all the opened ports of the machine and the corresponding application programs and the directory location where the running programs are located. (The unopened ports will not be displayed). It is a command line interface. It can help you determine whether your computer has a Trojan running, but it cannot directly identify a Trojan, and you will teach you how to identify it later. Fport is actually very close to the function of the command netstat-a-n that comes with Windows. Its main strength is that it not only displays the port number, but also displays the ProcessID of the corresponding process. This is useful for finding out if the same process is using multiple port numbers.)
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