It is very common in today computers (especially Laptops) to have Wired Network Card (NIC) as well as Wireless. Often users end up in a conflict and they do not know how to control the system.
Windows Network configures each card to have its own TCP/IP. The two cards can live together in peace and harmony provided they areconfigured to work with Set Priority.
The TCP/IP configuration has a special setting (under the Advance menu) for Metrics.
If you put a different number in the Metrics entry of the cards, the network connection would default to the connection with the lower number.
(ênfase minha, fonte )
O que isso basicamente significa é que, se você tiver uma placa com fio e uma sem fio, e definir a métrica da primeira como 1
e a segunda como 2
, o Windows será o padrão com a métrica mais baixa (isto é, a rede com fio).
TL; o DR Windows padroniza a conexão com a métrica mais baixa para evitar conflitos