“Dwell in booths [Hebrew, sukkot] seven days; all that are Israelites born shall dwell in booths.” The Talmud understands this commandment as requiring that one eat and conduct everyday activities in this hut-like structure. Gil Student explores a modern-day implication of this requirement:
A sukkah needs to be usable. Rabbi Moses Isserles (16th-century Poland) writes that a sukkah in which you cannot do certain basic things is an invalid sukkah. . . . According to Isserles, [then], does a sukkah today need WiFi?
I ask this because many people cannot take vacation from work for all of Sukkot. They have to work on some or all of ḥol ha-mo’ed [the last six days of the holiday, during which work and other activities are permitted]. However, particularly since the changes to work habits caused by COVID-19, many people will work from home during Sukkot. Do they need to work in their sukkah? If they do, they probably need WiFi in their sukkah so they can work. If so, a lack of WiFi might raise questions about the validity of the sukkah of someone who needs to work.
Therefore, it would seem that if you have to work from home, you should set up a workstation in your sukkah. If that requires WiFi, then you should make sure your WiFi extends to your sukkah and use it only for things that are permissible in a sukkah. It might even be true that according to Isserles, your sukkah is invalid if you cannot work inside it. . . . However, according to the Mishnah Berurah, [a highly regarded early-20th-century halakhic compendium], even though you should be able to work from your sukkah, if you for whatever reason you cannot, your sukkah is still kosher.