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You perform a protocol capture using Wireshark and a compatible 802.11 adapter in Linux. When viewing the capture, you see an auth req frame and an auth rsp frame. Then you see an assoc req frame and an assoc rsp frame. Shortly after, you see DHCP communications and then ISAKMP protocol packets. What security solution is represented?
Correct Answer: B
The frame sequence described shows: 802.11 Open System authentication and association DHCP communication (for IP configuration) ISAKMP packets, which are part of IPSec (used for key exchange and tunnel negotiation) This indicates that link-layer authentication is not used, but instead, higher-layer encryption (IPSec VPN) secures communications. Incorrect: A and C. Would show EAP negotiation and 802.1X authentication frames. D). WPA2-Personal would include a 4-Way Handshake before DHCP. E). EAP-MD5 does not involve ISAKMP and is used within 802.1X authentication. References: CWSP-208 Study Guide, Chapter 4 (IPSec and Upper-Layer Security) Wireshark Frame Analysis of IPSec Tunnels
