WPA (Wi-Fi Protected Access) is newer, and provides stronger wireless security – consequently we recommend WPA over WEP. Note however that not all wireless devices support WPA, and so it may not be practical to mix WEP and WPA on a wireless network. All current DrayTek wireless models (with a G at the end of the model number) support WPA.
WPA2 features increased security, and DrayTek firmware updates are recently starting to include WPA2.