VERSION
Chrome Version: [63.0.3239.140] + [stable]
Operating System: [Chrome OS  63.0.3239.140 Official Build]

If the computer detects odd activity on a network of multiple chromebooks, it gives a captcha to all chromebooks on the network. A bypass can be used by clicking "terms of service" and clicking sign in on the top right. This gives you full internet access without needing to verify you are not a robot. I use chromebooks on a school network which often blocks my peers from using the internet when chrome detects odd activity. INstead of doing the captcha, I clicked the external link of terms of service and signed in.