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The correct answers are B and C.

OBJ-3.2: Network Access Control is used to identify an endpoint’s characteristics when conducting network authentication. The GPS location of the device will provide the longitude and latitude of the user, which could be compared against the GPS coordinates of the building. Port security enables an administrator to configure individual switch ports to allow only a specified number of source MAC addresses to communicate using a given switchport. This would not help to locate the individual based on their location, though. Geo-IP, or geolocation and country lookup of a host based on its IP address, would identify the country of origin of the user, but not whether they are within the building’s confines. Geo-IP is also easily tricked if the user logs in over a VPN connection.

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