Exploring Wireless Networking. Wireless LANs. Market Trends. Differences Between WLAN and LAN. WLANs use r adio waves as the physical layer. WLANs use CSMA/CA instead of CSMA/CD for media access. Two-way radio (half-duplex) communication.
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Wi-Fi Alliance certifies interoperability between products.
Cisco is a founding member of the Wi-Fi Alliance.
Certified products can be found at http://www.wi-fi.com.