Hardware Solutions

Another excellent way of adding protection to your WLAN is to set up
your laptop so that it must identify its legitimate user correctly before
the machine will turn on or allow any access to protected network
resources. These hardware solutions rely on physical attributes as a
means for authentication; these cannot be easily duplicated by any
unauthorized users. Using these solutions allows you to reduce your
risks of using a wireless network and gives you extra power to ensure
you know who has access to your networking equipment.
The primary types of hardware countermeasures are shown in include:


Virtual private networks (VPNs)

Public key infrastructure (PKI)

Biometrics