We've just moved into a office we're renting that has ethernet jacks in the wall and also has WiFi. So we can connect a CAT5 from a laptop to an Ethernet jack in the wall and get online. Or, telling the laptop to look for networks, it finds a wireless signal that also gets us onto the Internet. Now I'm trying to understand what must be in the building to provide this.
I assume there's a cable that comes in from Comcast, or someone like that, that goes into a big router in a closet somewhere and that router creates a hundred or so RJ45 Ethernet ports that get wired out to the offices. This router must also create a WiFi signal that can be picked up in any office.
Does this sound about right?
Within our office, are devices that connect over the WiFi connection on the same network as devices that plug directly into the wall RJ45?
Will each office have it's own network, that other offices can't get onto?
Thanks for any insight here.