Hello, I know that WEP slows down my DSL speed over the network. Also, it's not as secure as WPA, but does WPA slow the DSL speed down like WEP does? If so, I suppose I'll just stick with MAC filtering. Oh, by the way, I have a Linksys 802.11g router and a USB 802.11g adapter on another computer. The computer with the router has McAfee Personal Firewall, the one (mine) with the USB adapter has ZoneAlarm. Thanks in advance for any help.