When you configure them properly, wireless networks work through a NIC's media access control (MAC) address. This setup makes any network secure because the wireless hub recognizes only registered NICs. However, I've seen wireless networks configured to work on other cards�a practice that puts network security at risk.
Configuring your network to use a MAC address is quick and easy. Take the time to set up your wireless network properly. When you do, the only disadvantage of such networks is transfer speed: The maximum speed of 11Mbps is slow by modern standards. Hence, wireless networks are best suited for home networks�which, by the way, usually suffer from lax setup standards.