That's not strictly true. While they CAN be as secure, in the real world many are not. And not because WiFi encryption is easily hackable, because it is not. But because they are more vulnerable to social engineering types of attack. Where an employee is tricked into revealing an access key or similar, the hacker need not be physically connected to the network to take advantage of this. Clearly this is inherently less secure, where the attacker does not have to be within traditional corporate boundaries. It's relatively easy to work around this with 2 factor authentication, etc, but many corporate WiFi networks still don't have these controls.
A well set up and managed enterprise wifi network does not require a user to type in an access key or anything, ever, therefore there are no social engineering attacks that can take place. The set up is part of the machine build.
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Apple have shown no interest in going after the enterprise market with their computers. In fact, looking at what they've done to "Server" in Lion, it's pretty clear they are becoming even less and less interested in this market.You're missing the point of my post. I'm not talking about individual employees buying laptops. Why would they do so? I'm talking about mass deployment across an an enterprise as a life-cycle upgrade.