DHCP just makes this easier. I personally use DHCP with reservations for all my kit, and a DHCP scope with 2 free IPs for guests. On WiFi I thought I covered that by saying just don't use it for online PvP games. I mostly just did it for simplification purposes. I could go into detail about the 7 layers of the OSI model, and describe how packets are put together on your network, but most people only need to know how to work their routers control panel. Good info there thanks