This question is purely out of curiosity but could someone explain why one of my windows 10 machines lists the same ipv6 DNS servers twice in ipconfig (see screenshot below). My other machine does not do this.
The IPv4 servers are set to be obtained by the router from my ISP (BT) and the ipv6 servers are specified manually within the router's configuration. There are no DNS servers manually specified within the network settings on the pc.
It does not make any difference when I release or renew the IP addresses or reboot.