Wifi & the Cloud
Yes, many of the coolest features of Glowforge are possible because we are running software in servers hosted in Google’s data centers.
Most print jobs fit in memory, so you only need the connection to start the print. If you lose your internet connection while printing it will finish. However, bigger jobs may not fit and are sent down in smaller pieces. If you lose your internet connection during a big print it will finish what it was doing, pause, and wait for connectivity to resume.
Glowforge supports the most popular home wifi network types, open and WPA2-protected.
There's no cost for you to print things with the Glowforge cloud service. It's free, included in your purchase price. There is no paid subscription required. All the features you see in the video at Glowforge.com are included at no additional cost (except for purchasing premium prints from the Catalog).
The product does not have a wired Ethernet adapter, and requires a Wi-Fi connection to work. However, it is possible to get an inexpensive wired ethernet to Wi-Fi bridge from any electronics store. It can also work with cellular internet adapters like the MiFi device and with cell phone hotspots.
No, a Wi-Fi connection to the internet is required to print.