[jyl]

Okay, I am totally ignorant about even the basics of networking, outside of messing around with WiFi access points and extenders. The following question will be very basic indeed.

I am remodeling an office suite. There will be two private offices and one shared conference room. The offices will be occupied by persons A and B, who are good friends but running separate businesses with separate computers, printers, etc. Internet to the suite will be via fiber modem, a single service.

WiFi question: I want to set up three WiFi networks, for A's internet and devices, one for B's internet and devices, and a Guest network that only provides internet.

Ethernet question: I want to have wires and jacks (Ethernet) in A's office that can connect A's devices to the internet and to each other but not to anything plugged into the conference room or the other office, similar in B's office, and jacks in the conference room that deliver internet only.

Security: I . . . uh . . . want to be secure? Whatever that entails?

How do I do this? A broad, high-level conceptual answer will be greatly appreciated. Any detail beyond that will be appreciated too, like "buy this model of X".

If the answer is "hire someone, this is clearly beyond you" then that would be good to know too.