A security administrator is responsible for ensuring that there are no unauthorized devices utilizing the
corporate network. During a routine scan, the security administrator discovers an unauthorized device
belonging to a user in the marketing department. The user is using an android phone in order to browse
websites. Which of the following device attributes was used to determine that the device was
unauthorized?

A.
An IMEI address

B.
A phone number

C.
A MAC address

D.
An asset ID