CWNP CWNA CWNA-107 Questions & Answers

• Question 141:

  What common feature of MDM solutions can be used to protect enterprise data on mobile devices?

  A. Over-the-air registration

  B. Onboarding

  C. Containerization

  D. Self-registration

  Correct Answer: B

• Question 142:

  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 802.112016, 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

  Correct Answer: D

• Question 143:

  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

  Correct Answer: A

• Question 144:

  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.

  Correct Answer: B

• Question 145:

  A client complains of low data rates on his computer. When you evaluate the situation, you see that the signal strength is -84 dBm and the noise floor is -96 dBm. The client is an 802.11ac client and connects to an 802.11acAP. Both the client and AP are 2x2:2 devices. What is the likely cause of the low data rate issue?

  A. Weak signal strength

  B. Too few spatial streams

  C. Lack of support 802.11n

  D. CAT5e cabling run to the AP

  Correct Answer: A

• Question 146:

  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

  Correct Answer: A

• Question 147:

  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.

  Correct Answer: C

• Question 148:

  Lynne runs a small hotel, and as a value added for his customers he has implemented a Wi-Fi hot-spot. Lynne has read news articles about how hackers wait at hot-spots trying to take advantage of unsuspecting users. He wants to avoid this problem at his hotel.

  What is an efficient and practical step that Lynne can take to decrease the likelihood of active attacks on his customers' wireless computers?

  A. Implement Network Access Control (NAC) and require antivirus and firewall software along with OS patches.

  B. Implement an SSL VPN in the WLAN controller that initiates after HTTPS login.

  C. Enable station-to-station traffic blocking by the access points in the hotel.

  D. Require EAP_FAST authentication and provide customers with a username/password on their receipt.

  Correct Answer: B

• Question 149:

  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

  Correct Answer: D

• Question 150:

  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

  Correct Answer: B