Put one half of the network on a different subnet than the other half.
A router is necessary for this purpose
Most of compounds composed of molecule are low compared with those of ionic compounds. In most solids formed from molecules, only the weak attraction between molecules need to be broken.
No place like home.
no...
How to Pick the Right Home Network Cables
Understanding your Home Network Router #6 - MAC Address Filtering
Understanding your Home Network Router #2 - Understanding and Using DHCP
Understanding your Home Network Router #10 - Getting Info from Your Router