The takeaway should be to keep some sane garde-fou principle, such as "form follows function", and use it as unit test before rolling out a design/product/...

security - a stylized lock. connectivity - linked members of a chain, which are connected. WLAN - expanding circes of a radiowave login - a human head on an upper body

All which exist as icons for decades in other UI. In this case there seems to be a design constraint of only using circles, semicircles and quartercircles. That fails most in case of the Wifi Symbol which needs concentric rings. Here those are just simulated. And the metaphor of chain links for connectivity strains. But that was also the case when it stands for hyperlink.