I just moved to a senior living community (Affinity), that uses Wi-Fi to connect to the Internet.
In my old condo, I had a Cable/Internet/Phone modem in the basement where my iMac & Netgear wireless router were. My wife's iMac was on the 2nd floor, and I had an Airport Express on the main floor along with a Blu-Ray player and a Wii. I had cat-5 cables connecting the router to both computers, to the Airport Express, and to the Blu-Ray player. My Wii, my iPhone, and my iPad used the Wi-Fi. We both had printers connected to our computers via cat-5, although my printer also can use Wi-Fi.
We moved in. I connected our computers to Affinity (unsecured network). I connected my Kodak ESP 7250 printer to Affinity. But I haven't been able to get our computers to find it. I printed out its network configuration that says it is connected with 192.168.1.128.
I also noticed that iTunes doesn't see either iPad nor iPhone unless I plug them into my computer.
I haven't plugged in my Netgear router. But my next step was to plug in my Airport Express. I checked KeyChain and typed in Airport to see 3 copies of "Howard Brazee's Network" (all with the same password (WPA??)), two copies of Netgear, and one copy of Airport Express. So I tried setting up my printer to that network. It failed, and printing its configuration it sees it is Not Connected to "Howard Brazee's Network" with WPA2-AES & PSK - with no IP address. Airport utility saw a wireless client with a 169.254.2.150 IP address. Not good. I tried to connect my Wii to my network without success.
I noticed that my phone, my pad, and worse of all, my mac were connected to "Howard Brazee's Network", and obviously not to the Internet. So I unplugged the Air Port Express. I haven't yet tried my Wii with the Affinity network.
While it would be nice to not be open to everybody on the Affinity network, that isn't necessary. I don't really need to have my Blu-Ray connected, but I need my printer connected to our printers, and want my phone and pad visible in iTunes (can I control whether it is mine or my wife's???), and would enjoy having the Wii connected to the Internet.
Oh, I haven't tried connecting one printer via cat-5 to one computer. If that is the only way to get it visible to both computers, I will do it, we shared printers before when one was out of ink.
I have shared this issue on Fidonet, but haven't yet resolved it.