Basically I currently have a very simple network setup. Internet from my ISP connects to a modem, the modem connects to a wireless router. All devices throughout the house connect to this router whether thru a wireless or wired connection. My question is, since I have an office within my house, how can I segregate my office devices from the rest of the network? This is to prevent other devices outside the office from being able to print to the office printer and also to make sure the files stay private and inaccessible to other non-office devices. But, I also have a laptop which I'd like to wirelessly print to and access my files, but only if I'm connected to the "office" network.
Ideally, I'd like to have two routers, one for the office and the other for the rest. But, how can I ensure that both routers are unaware of each other while utilizing only one modem. Do I need something like a switch or a hub? If so, what kind of setup would I need to do thru the firmware?