Why does my Windows 10 pro machine have thee active networks listed

I'm so confused.
And I wonder if I might ask for some help understanding what I'm seeing and why.

I just built a new Windows 10 pro machine from an ISO image.
NO issues.
It works fine.
It pretty much builds itself.

But when I look at my "View your basic Network information and set up connections" screen, I have thee items listed.
NETWORK, NETWORK 2 and NETWORK 3.
All read "Access Type Internet"
All read "Connections: Ethernet"

I have one Ethernet card in the pc.
I don't do anything wireless. Yet.

Why do I have three items listed ?

Of the three that are listed. how can I tell which one I am using ?

With Windows 7, I could merge all thee.
With Windows 10, how do I merge all three or delete the two I am not using ?
And once deleted, how to I tell Windows 10 not to create any more the next time the pc re-boots ?

Thanks in advance for any information.

Thanks for the reply.
Here is a screen shot from "Winver" as well as a screen shot of my "Basic network information" screen.
I know that my pc is using the network, named "NETWORK".
I have figured out (found on the Internet) how to delete those other two networks that got created somehow.
But I can't figure out why they were created (Thanks for your comments) not how to prevent them from being re-created on the pc restart following their deletion.
Thanks for any additional insights and suggestions.

Additionally, when I perform the Ipconfig /all, it lists three things.
Ethernet adapter Ethernet
Tunnel adapter isatap.betasys.com
Tunnel adapter teredo Tunneling Pseudo-Interface
Ethernet is my physical Ethernet card. (I believe.)
I'm at a loss as to knowing what the other two things are.
And, I'm really unsure if Network 2 and Network 3 or related to them at all.

:)

Your Windows Version is WAY WAY behind ........ perhaps a year or more i think .240 came out in April 2015.

The Other two as I said are installed by default by Windows 10 , if you uninstall them they will just get reinstalled unless you remove the Protocol too , even then Win10 may reinstall them ? I have not tried to do that , no need too....

ipconfig /all will tell you what the 3 are ... just match the IP address in IPCONFIG to the one in the properties of each Network Adaptor if you are worried. I am not sure why the other two show in the Networking window though.... it maybe just a win10.240 quirk ?

You should down load the latest ISO and do an Inplace Upgrade to the Latest version (1607. called AU too) , as I suspect you are stuck on .240 and not get Major Updates as you should .... I have now seen about 5 Computer with this issue , 4 worked fine with the Inplace Upgrade , 1 I had to Clean install though to get past it.

There is a Tutorial here:

Repair Install Windows 10 with an In-place Upgrade - Windows 10 Forums[2]=Installation%20and%20Setup