Re: Collision/Broadcast domains question.
every port on a switch is it's own collision domain, and every port on a router is it's own collision domain. Due to how switches work, this is the default setting. Since switches sent from one host to another, rather than from one host to all other hosts (like a hub or signal repeater). I think you can configure broadcast domain settings on most domestic and commercial routers.
EVGA SLI Micro Z68 // Intel i5-2500k // 8GB Corsair Vengeance 1866MHz // Overclocked 2GB MSI R9 270X // Corsair Carbide SPEC-03 // Kingston Hyper-X 120GB // 2TB WD Green + 500GB WD Black