Intermec WA21 System Manual page 294

Glossary
280
WPA (Wi-Fi Protected Access)
A feature that can be implemented in the 802.11g, 802.11b, and 802.11a
radios for security in a wireless network. WPA is a strongly enhanced,
interoperable Wi-Fi security protocol that addresses many of the
vulnerabilities of WEP. It provides stronger RC4 encryption over standard
WEP with TKIP.
MobileLAN access WA2X System Manual