Network diagram:
https://www.lifewire.com/home-network-diagrams-4064053
https://www.edrawsoft.com/article/home-network-diagram.html
Or you can google "home network diagrams" yourself and find other examples.
[If adventureous and interested in such things you could download a free/trial app to do the drawing. Some apps do "discovery" meaning that they actively seek network devices and the corresponding details regarding any given device.]
You can use 2" x 2" sticky notes - one for each device with name, make, model, IP address and MAC. Include the dish - make and model?
Likely that the MAC is printed on some device labels. Use the sticky notes to layout the network on a larger sheet of paper. Then draw in or otherwise indicate the connectivity between devices.
And you do not have to get it right the first time. There will be revisions/do-overs as you learn.
The most important part is that the diagram helps you understand your family's network and communication devices using the network.
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You can use "arp -a" via the Command Prompt to discover device IP adddresses and MACs. The devices should have IP addresses 192.168.86.X Dynamic or static IP addresses.
Knowing the IP addresses is important. Why? Two devices should not have the same IP address. If not configured properly the router could be assigning a dynamic IP address that is in use by a device statically assigned with the same IP address.
With all of the devices and being in and out of the network I would not be surprised to discover an IP address conflict.
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As for coax cables (and cables in general) take a look at what is printed along the length of the cables.
Reason:
The cable from the dish may not be rated for outdoor/exterior use. The cable works but may be degraded.
For example: the cable may be Cat3....that probably would not be good.