My guess would be that each institution would have a different policy based on how they are wired for Internet access. While in isolation during the SCT, they provided me with a cable to their Internet site. Further, while in the infusion labs, etc they had WiFi available.
I was encouraged to keep busy during that period and was able to do a lot of advance planning work as well as e-mail communications. Over-all it worked well, just had to shut down and take a few naps during the recovery period.
Later reviewing some of the work I had completed, I did find that in some instances, the chemo must have gotten to me.