What advantage provided by 802.11n and 802.11ac is not usable in 1X1:1 low-end client devices?
A. Channel bonding
B. MCS data rates
C. Maximal Ratio Combining
D. Mandatory data rates
The installation crew for your WLAN project wants to install a few APs to locations nearby the ones specified in the RF design document. What next step should occur? Response:
A. Confirm the mounting hardware.
B. Choose a different AP model.
C. Update the documentation.
D. Consult the RF designer.
In a multiple channel architecture (MCA) network supporting 802.1X authentication, what aspect of WLAN design affects client roaming efficiency and effectiveness?
A. PHY standard used by the AP
B. Key caching protocols
C. Cipher suite
D. PHY standard used by client
You have been tasked with performing safety and operations training for outdoor bridge link installation. The antennas are to be installed on a 70-foot tower on one end and the roof top of an office building on the other end. What might be required for the tower installation?
Response:
A. Hiring a certified tower installer.
B. Special antennas that avoid reflections on the tower poles.
C. APs that are designed to operate above 70 feet.
D. Special RF cables that will not create loss incurred by the metal tower construction.
A business traveler from North America is in Europe. The hotel only provides coverage in 2.4 GHz. The traveler connects to the hotel's SSID and notices an AP in the hotel room. However, the laptop reports a very low RSSI when connected. The traveler does not have the same problem when connecting in the lobby. What would be the most likely cause of the low RSSI in the hotel room?
A. The AP in the room is using ZigBee instead of Wi-Fi.
B. The AP in the room is transmitting on channel 13 and the traveler associated to a non- channel 13 AP located elsewhere.
C. The switchport that the AP is connected to is only capable of transmitting at 10 Mbps.
D. The AP in the room is using Bluetooth instead of Wi-Fi.
What architecture suffers the biggest limitation for sharing control information across APs? Response:
A. Independent autonomous
B. Centralized
C. Cooperative autonomous
D. Controller
E. Distributed
You're about to deploy an Enterprise-class VoWLAN infrastructure. You need to ensure that QoS is properly configured throughout the network. What Access Category (AC) should voice frames/packets use?
A. AC_VI
B. AC_VO
C. AC_BE
D. AC_BK
What limitation exists when WMM is not enabled on an 802.11n WLAN? Response:
A. The maximum channel-width will be 20MHz
B. Only two ACs will be available
C. EDCA values will change
D. 802.11 QoS will not be available
After designing and deploying a WLAN infrastructure, you realized the CCI is causing poor performance in the 2.4 GHz band. Primarily, you've designed the
WLAN for 5 GHz and 2.4 GHz as a best effort. You found out that the implementers didn't follow your guidelines when configuring the WLAN infrastructure. What can you do to minimize as much as possible the CCI impact in the 2.4 GHz band?
A. Add more APs to the infrastructure
B. Increase the transmit power on all APs
C. Turn-off 2.4 GHz radios on some APs
D. Use all channels available in the 2.4 GHz band
You are on site, planning a network at a freight shipping company on a busy harbor. Since the preliminary WLAN design specifies support for the 5 GHz spectrum, you would like to test for radar pulses to determine if DFS channels should be supported at this facility. As a part of your spectral survey with a laptop-based analyzer, you include DFS testing to identify the presence of radar. This is done by manually observing Real-time FFT, Duty Cycle, and Active Devices charts of the spectrum analyzer software.
What potential drawback is present with this DFS test method?
A. Many WLAN products that support DFS channels report several false positives. Ideally, the actual WLAN equipment used in the deployment should be used to test for DFS.
B. Some sources of 5 GHz radar, such as military ships, are mobile in nature. A longer, automated test setup should be used to identify the presence or absence of radar.
C. Manual identification of radar pulses using spectrum analysis charts can be very difficult due to radar's low amplitude at the Wi-Fi receiver.
D. Modern spectrum analyzer adapters do not provide the necessary bandwidth resolution required to detect and measure radar signatures.
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