How does the 802.1x supplicant communicate with the authentication server?
A. The supplicant creates EAP packets and sends them to the authenticator, which translates them into RADIUS and forwards them to the authentication server.
B. The supplicant creates EAP packets and sends them to the authenticator, which encapsulates them into RADIUS and forwards them to the authentication server.
C. The supplicant creates RADIUS packets and sends them to the authenticator, which translates them into EAP and forwards them to the authentication server.
D. The supplicant creates RADIUS packets and sends them to the authenticator, which encapsulates them into EAP and forwards them to the authentication server.
In RADIUS/EAP, RADIUS is used to shuttle RADIUS-encapsulated EAP Packets between the NAS and an authentication server.
B is right.
https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Security/TrustSec_1-99/Dot1X_Deployment/Dot1x_Dep_Guide.html
•EAP over LAN (EAPoL)—An encapsulation defined by 802.1X for the transport of the EAP from the supplicant to the switch over IEEE 802 networks.
EAPoL is a Layer 2 protocol.
•RADIUS—The de facto standard for communication between the switch and the authentication server.
The switch extracts the EAP payload from the Layer 2 EAPoL frame and encapsulates the payload inside a Layer 7 RADIUS packet.
Figure 3 shows the 802.1X wire protocols.
Wrong Answer. Right Answer would be EAP Packets encapsulatd in RADIUS packets. -> B
https://www.ietf.org/rfc/rfc3579.txt Page 4