Today, 74 percent of companies have WLAN, although many are still in early phases of deployment. IT executives are eager to expand those rollouts, but delay them because of security concerns, perhaps needlessly, says Robin Gareiss, an analyst with research firm Nemertes.

"There really is a gap in the perception of Wi-Fi security and reality," she notes. "Right now, the perception among IT executives is that you cannot secure wireless networks to a level acceptable to the enterprise. But you can--it might just be a lot more detailed than they want to deal with at this point."

Companies have the option of VPNs or secure network appliance gateways from such companies as Vernier Networks or Bluesocket. "But that adds more cost, complexity [and] management," says Gareiss.

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