Determine tcp port number

my project requires me to read the data from one TCP port and process the data then transfer it out from another TCPO port. (using PXIe-8115 which have 2 tcp port). problem is i have no idea how to determine the port number of the TCP port.
in what way i can determine the port number of both port?

here is an example i found online but i couldn't understand it. the instruction says the server need to be run before client. but the port number seems a little bit random to me but it did manage to get some signal.
can i know where the signal come from and how i can determine the correct port number. i know this question mayby sounds basic or even stupid. but i really don't have much knowledge on Labview. any help would be useful.
Attachments:
Client (trial).vi ‏16 KB
Server (trial).vi ‏11 KB

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C:\icm\pft\PG1A>
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Determine tcp port number

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