Network Magic is a utility that takes on the job of configuring your home network - everything from local file and printer sharing and wireless configuration to remote file access and security. It can also "monitor and repair" your network. One of the coolest features is the ability of Network Magic to create a network topology map with all network-aware devices that it can detect represented. If there is a problem, for example one of the devices gets disconnected, Network Magic can tell you exactly where the disconnect occurred. Network Magic has both free and commercial versions available.