You can possibly alleviate growth problems by setting up a router and keeping traffic on its own subnetwork. For example, if you play wireless LAN games, the data traffic might bog down the entire network. If you can keep all of this traffic (which is mostly localised) on one subnetwork, users on other subnetworks may not be affected.

Most routers support the creation of different subnetworks. Because each model has different settings and commands, read your particular router's documentation to set up different networks.

A router can also be an effective way to secure different parts of your home network. For example, you may restrict certain types of traffic on certain subnetworks (such as only e-mail and Web traffic).