XYZ Company has decided to install an 802.11 WLAN system that will support 1000 wireless users, but they are concerned about network security. XYZ is interested in deploying standardized security features. In addition to WPA2-Enterprise with PEAP and role-based access control, XYZ would like to support management frame protection as well as a fast secure roaming protocol for future mobile handsets.
As XYZ Company selects a product to deploy, what two IEEE amendments, which are included in 802.11- 2016, should be supported to provide the management frame protection and fast secure roaming security features?
A. 802.11j and 802.11k
B. 802.11r and 802.11k
C. 802.11z and 802.11w
D. 802.11r and 802.11w
Three access points are used within a facility. One access point is on channel 11 and the other two are on channel 1. The two access points using channel 1 are on either side of the access point using channel 11 and sufficiently apart so that they do not interfere each other when they transmit frames. Assuming no other Aps are in the vicinity, is CCI still a possibility in this network and why?
A. Yes, because the client devices connected to one of the channel 1 APs will transmit frames that reach the other channel 1 AP as well as
B. No, because the Aps are far enough apart that no CCI will occur
C. No, because CCI only occurs in the 5 GHz frequency band
D. Yes, because channel 11 loops around and causes CCI with channel 1
When a client station sends a broadcast probe request frame with a wildcard SSID, how do APs respond?
A. For each probe request frame, only one AP may reply with a probe response.
B. Each AP responds in turn after preparing a probe response and winning contention.
C. Each AP checks with the DHCP server to see if it can respond and then acts accordingly.
D. After waiting a SIFS, all APs reply at the same time with a probe response.
What is appended to the end of each 802.11 data frame after the payload?
A. FCS
B. Preamble
C. MAC header
D. PHY header
The BSA of an AP covers the area used by the sales and marketing department. Thirty-five stations operate in this space. The user indicate that they need more throughput and all stations are 5 GHz capable 802.11ac clients. The current AP configuration uses 20 MHz channels in both 2.4 GHz and 5 GHz. What is the least expensive solution available for increasing throughput for these users without implementing configuration options that are not recommended?
A. Use a 160 MHz channel on the 5 GHz radio
B. Use a 40 MHz channel on the 5 GHz radio
C. Install a second AP in the coverage area
D. Use a 40 MHz channel on the 2.4 GHz radio.
Return Loss is the decrease of forward energy in a system when some of the power is being reflected back toward the transmitter.
What will cause high return loss in an RF transmission system, including the radio, cables, connectors and antenna?
A. The use of cables longer than one meter in the RF system
B. High output power at the transmitter and use of a low-gain antenna
C. A Voltage Standing Wave Ratio (VSWR) of 1:1
D. An impedance mismatch between components in the RF system
You are reporting on the RF environment in you facility. The manager asks you do describe the noise floor noted in the report. Which of the following is the best explanation?
A. The energy radiated by flooring materials that causes interference in the 2.4 GHz and 5 GHz bands.
B. The noise caused by elevators, microwave ovens, and video transmitters.
C. The RF energy that exists in the environment from intentional and unintentional RF radiators that forms the baseline above which the Intentional signal of your WLAN must exist.
D. The extra energy radiated by access points and client devices beyond that intended for the signal.
Which one of the following 802.11 PHYs is more likely to be used in an industrial deployment but not likely to be used in standard office deployments?
A. SIG
B. VHT
C. OFDM
D. HT
You are implementing a multi-AP WLAN and fast secure roaming is essential. Which one of the following methods is an IEEE 802.11 standard method for fast roaming?
A. Band steering
B. FT
C. OKC
D. Load balancing
What best describes WPA2 in relation to 802.11 wireless networks?
A. WPA2 is specified in the 802.11 standard as implementing CCMP/AES.
B. WPA2 is the standard that defines security for WLANs.
C. WPA2 is a certification created by the Wi-Fi Alliance that validates devices correctly implement CCMP/ AES.
D. WPA2 is the second version of WPA and it enhances security through the use of TKIP instead of WEP.
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