An administrator has noticed mobile devices from an adjacent company on the corporate wireless network. Malicious activi

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An administrator has noticed mobile devices from an adjacent company on the corporate wireless network. Malicious activity is being reported from those devices.
To add another layer of security in an enterprise environment, an administrator wants to add contextual authentication to allow users to access enterprise resources only while present in corporate buildings. Which of the following technologies would accomplish this?

A. Port security
B. Rogue device detection
C. Bluetooth
D. GPS