Microsoft Automatic Update trusted CTL

 Microsoft Automatic Update URL for trusted CTL

1. The computer requires HTTP (TCP port 80) access and name resolution (TCP and UDP port 53) ability to contact ctldl.windowsupdate.com.
2. Currently all the downloaded files require approximately 1.5 MB of space.

https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/dn265983(v=ws.11)