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Question 27 - NSE7_LED-7.0 discussion

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Refer to the exhibit.

Examine the network diagram and packet capture shown in the exhibit

The packet capture was taken between FortiGate and FortiAuthenticator and shows a RADIUS Access-Request packet sent by FortiSwitch to FortiAuthenticator through FortiGate

Why does the User-Name attribute in the RADIUS Access-Request packet contain the client MAC address?

A.
The client is performing AD machine authentication
Answers
A.
The client is performing AD machine authentication
B.
FortiSwitch is authenticating the client using MAC authentication bypass
Answers
B.
FortiSwitch is authenticating the client using MAC authentication bypass
C.
The client is performing user authentication
Answers
C.
The client is performing user authentication
D.
FortiSwitch is sending a RADIUS accounting message to FortiAuthenticator
Answers
D.
FortiSwitch is sending a RADIUS accounting message to FortiAuthenticator
Suggested answer: B

Explanation:

According to the exhibit, the User-Name attribute in the RADIUS Access-Request packet contains the client MAC address of 00:0c:29:6a:2b:3d. This indicates that FortiSwitch is authenticating the client using MAC authentication bypass (MAB), which is a method of authenticating devices that do not support 802.1X by using their MAC address as the username and password. Therefore, option B is true because it explains why the User-Name attribute contains the client MAC address. Option A is false because AD machine authentication uses a computer account name and password, not a MAC address. Option C is false because user authentication uses a user name and password, not a MAC address. Option D is false because FortiSwitch is sending a RADIUS Access-Request message to FortiAuthenticator, not a RADIUS accounting message.

asked 18/09/2024
Ted Kang
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