Given: ABC Company has a VoIP implementation in place over the Ethernet network at their facility. To watch for anomalies and to monitor statistics of VoIP phone calls, ABC Company’s administrator has configured a set of VoIP filters on their distributed Ethernet protocol analyzer. ABC Company has recently installed a dual-band IEEE 802.11 controller-based WLAN system (with lightweight APs) that is configured for WMM and WPA2-Enterprise and a wireless intrusion prevention system (WIPS). Considering the CCMP/AES encryption used on the WLAN segment, ABC Company’s administrator knows that no Layer 3-7 data will be available via their WIPS.

What is the best way for the network administrator to gather call setup and jitter VoIP statistics for the wireless segment?

A.
Have a wireless network management system (WNMS) poll the access points for wVoIP statistics every second.

B.
Connect an IEEE 802.11 voice analyzer to the wired network so that it can communicate with the VoIP server platform while it analyzes WLAN calls.

C.
Place an IEEE 802.11 voice analyzer in the middle of the STA-to-AP connection and gather statistics from management frames sent by each.

D.
Since the data payload encryption is impossible to crack, the only useful statistic the administrator can gather is call duration.

E.
Configure the WIPS for frame slicing at 128 bits, and measure statistics carried in the IEEE 802.11 frame header’s QoS Control field.