6.7 Summary
There is no disputing the benefits that wireless local area networks provide to enterprises.
Information technology departments have a mandate to provide wireless services in support
of business initiatives, as well as a responsibility to provide these services securely. The
history of 802.11-based WLANs has been a legacy of insecurity and significant risk to
early adopters. Both WEP and its interim successor WPA have provided only minor
obstacles to determined hackers and should be deployed with caution.
The ratification of IEEE 802.11i laid the foundation for drastic improvements in
wireless security. WPA2 offers more formidable encryption, better key management, and
robust authentication, as well as access point roaming.
Motorola surpasses a key shortcoming within WPA2 - insufficient access point
roaming speeds. The current specification permits a credentials negotiation process, which
can cause lengthy disruptions in the connections, a fatal problem for time-sensitive
applications such as wireless-based VoIP. Motorola developed Opportunistic PMK
Caching to overcome this issue, a technique that leverages the centralized wireless switch
architecture and provides the highest-speed Wi-Fi roaming available on the market.
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