IEEE requires only mandatory data rates of OFDM using 6, 12, and 24 Mbps, regardless
whether it is 802.11a or 802.11g OFDM.
Wi-Fi Certification
Even after the 802.11 standards were established, a need to ensure interoperability among
802.11 products still existed. The Wi-Fi Alliance is a global, nonpro?¬?t industry trade
association devoted to promoting the growth and acceptance of wireless LANs. One of the
primary bene?¬?ts of the Wi-Fi Alliance is to ensure interoperability among 802.11 products
offered by various vendors by providing certi?¬?cation. Figure 3-3 shows an example of the
Wi-Fi Alliance certi?¬?cation logo.
Figure 3-3 Wi-Fi Alliance Certi?¬?cation Logo
Certi?¬?ed vendor interoperability provides a comfort zone for purchasers. Certi?¬?cation
includes all three IEEE 802.11 RF technologies, as well as an early adoption of pending
IEEE drafts, such as one that addresses security. The Wi-Fi Alliance adapted the IEEE
802.11i draft security as WPA and then revised it to WPA2 after ?¬?nal release of
IEEE 802.11i.
?®
Understanding WLAN Security 215
Summary of Exploring Wireless Networking
The following summarizes the key points that were discussed in this section:
?– People now expect to be connected at any time at any place.
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