It's the networking plugin that talks to the printer over the network (while exporting gobs of telemetry to Bambu's servers).
replyWithout the networking plugin you cannot monitor your printer or send prints to it remotely. You can copy files to a flash drive and print that way.
To be clear for anyone else reading: those are the official options. But there are plenty of alternatives that allow for using a Bambu remotely. It just won't be quite as polished an experience as finding a model in Handy and hitting print.
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