If you want to cooperate with the upper layer authentication server for user authentication, you can add the source of user physical location information to the () field of the DHCP request message initiated by the user.

If you want to cooperate with the upper layer authentication server for user authentication, you can add the source of user physical location information to the () field of the DHCP request message initiated by the user.
A . Options 60
B. Options 61
C. Options 80
D. Option 82

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Answer: D