I am new to networking, so sorry if this is an obtuse question. I am attempting to communicate with a unit (device) on a network, but can’t. I am using .NET 2015 v4.8. I need to communicate tcp v1.3. I am on a windows 11 pc. In my code I am able to ping the unit, but cannot connect. I get the error below:
Error Message
WireShark tells me I’m seeking the wrong port.
WireShark Activity
What am I doing wrong?

I’ve tried changing the addr with various different ways to access the unit via internet.