AdGuard’s DNS filtering software sometimes sends anonymized query statistics to *.adguard.net for reputation checks or to update filter lists. The tb-rg segment might represent a specific elemetry b atch ID for r eporting g roup. In other words, your device or router is reporting usage metrics to a dedicated endpoint.
If you have successfully downloaded your ISO, How to perform a clean installation of Windows 11. How to bypass TPM/Secure Boot checks on older hardware. Share public link tb-rg adguard.net
If that alias points to an AdGuard DNS server, the log entry would show the alias resolving to adguard.net . tb-rg adguard.net