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Windows 11 Home
IP addresses establishing inbound connections belong to DoD, Department of Defense (DNIC).
Via UDP port 2177, Microsoft QWAVE (Quality Windows Audio Visual Experience)
I logged 5 IP addresses from DoD Network Information Center (AS749) establishing inbound connections to the computer over several days time.
How is this possible?
(screenshots attached, IP address highlighted in red.)
(EDIT: Microsoft removed my screenshots. I've linked to them via imgur below)
Somehow the 2 screenshots got removed.
Just an observation here; 144.18.187.108 is in the Local Address column, not the Remote Address column. So that would imply that that address is somehow assigned to your Laptop1 machine. Except that the Protocol column says UDPv6 and 144.18.187.108 is an IPv4 address, not IPv6. Maybe it's a bug in TCPView that is interpreting an IPv6 address incorrectly as IPv4. I don't know that's a guess.
On my laptop I see a connection to 48.0.0.0, and I have no idea where that came from.
You would probably need to run a network trace to see if you can capture that data.