Perhaps one of the best ways to control the use of the network as well as prevent unauthorized access is to filter MAC addresses. Only those whose MAC addresses are added to your router can use the wireless network. Linksys WAG320N lets you do that. Besides this, you can also activate the SPI firewall as well as encrypt data as it travels in either wired or wireless connection. There are also 4 Ethernet ports, which allow 4 different devices to take advantage of the fast speed and superior performance. Though already wireless N, this is still compatible with a wireless G network.