In An IEEE 802.11-complaint WLAN, when is 802.1X controlled port placed into the unblocked state?
A.
After open system authentication
B.
After any group handshake
C.
After the 4-way handshake
D.
After RADIUS authentication
Explanation:
802.1X/EAP authentication must fi rst occur to achieve mutual validation of both the supplicant and authentication server credentials. 802.1X/EAP provides the PMK necessary for the 4-Way Handshake. The 4-Way Handshake then generates the temporal keys used for encryption. Once the temporal keys are created and installed, the controlled port of the authenticator is no longer blocked and the supplicant can now send encrypted 802.11 data frames through the controlled port onward to network resources. No traffi c can pass through the controlled port until mutual authentication occurs and dynamic keys are created.