dhcpcd, wpa_supplicant. Used connman awhile back, but wpa_supplicant is pretty much default on every distro, and what's the first thing you generally want to do when installing a new distro? connect to the internet. so then once you do that it's done forever usually. however, I don't usually roam around with my chromebook all too much and have to connect to really bizarre networks you get out there.