850-01 Wlan Practice Questions

In an enterprise WLAN, what condition will prevent a dual-band VHT/HT client device from performing a fast and seamless transition (i.e. latency-sensitive applications are notdisrupted) between two access points that are managed by the same WLAN controller?

• AA. The current AP is using channel 1 and the new AP is using channel 40.
• BB. The SSID of the current AP does not match the SSID of the new AP.
• CC. The current AP supports only HT and the new AP is VHT capable.
• DD. The access points are hiding the SSID in Beacons and Probe Response frames.

In an 802.11n WLAN with a heterogeneous set of associated client devices including 802.11b, 11g, and 11n, what HT protection mode will theBSS use?

• AA. Mode 0: No protection mode (Greenfield)
• BB. Mode 1: Nonmember protection mode
• CC. Mode 2: 20 MHz protection mode
• DD. Mode 3: Non-HT mixed mode

What statement about 802.11 WLAN performance is true?

• AA. Use of larger frame sizes results in greater throughput in low interference environments.
• BB. BSS support for 65 KB A-MPDUs willincrease the maximum data rate available to client devices.
• CC. In 802.11ac, changing the security mechanism from WPA2-Personal toWPA2-Enterprise will enable the
• DD. Compared to an Independent BSS, an Infrastructure BSS can provide almost twice the throughput