CWNP CWNA CWNA-107 Questions & Answers

• Question 1:

  You administer a small WLAN with nine access points. As a small business, you do not run a RADIUS server and use WPA2-Personal for security. Recently, you changed the passphrase for WPA2-Personal in all APs and clients. Several users are now reporting the inability to connect to the network at times and it is constrained to one area of the building. When using a WLAN scanner, you see that the AP covering that area is online and has a strong signal. No other changes have been made to the environment and all access points are the same model. What is the likely problem?

  A. The AP that covers the problem area requires a firmware update

  B. The clients are improperly configured

  C. The AP that covers the problem area has failed

  D. The AP that covers the problem area is improperly configured

  Correct Answer: A

• Question 2:

  What phrase defines Equivalent Isotropically Radiated Power (EIRP)?

  A. Power supplied from the transmission line to the antenna input

  B. The power output from the radio after cable losses

  C. The power output from the radio into the RF cable

  D. The highest RF signal strength that is transmitted from a given antenna

  Correct Answer: D

• Question 3:

  When antenna gain is reported in dBI, the gain of the antenna is compared to what theoretical antenna?

  A. Yagi

  B. Dipole

  C. Rubber ducky

  D. Isotropic radiator

  Correct Answer: D

  Reference https://en.wikipedia.org/wiki/Antenna_gain

• Question 4:

  What Linux shell command can be used to view the hardware and PHY capabilities of a wireless adapter in detail including channel widths, output power settings, channels supported, and more?

  A. ifconfig

  B. iw phy

  C. netsh wlan show device

  D. iwconfig

  Correct Answer: D

• Question 5:

  You support a WLAN using dual-band 802.11ac three stream access points. All access points have both the 2.4 GHz and 5 GHz radios enabled and use 40 MHz channels in 5 GHz and 20 MHz channels in 2.4 GHz. A manager is concerned about the fact that each access point is connected using a 1 Gbps Ethernet link. He is concerned that the Ethernet link will not be able to handle the load from the wireless radios. What do you tell him?

  A. His concern is valid and the company should upgrade all Ethernet links to 10 Gbps immediately.

  B. His concern is valid and the company should immediately plan to run a second 1 Gbps Ethernet link to each AP.

  C. His concern is invalid because the AP will compress all data before transmitting it onto the Ethernet link.

  D. Due to 802.11 network operations and the dynamic rates used by devices on the network, the two radios will likely not exceed the 1 Gpbs Ethernet link.

  Correct Answer: A

• Question 6:

  You manage a WLAN with 100 802.11ac access points. All access points are configured to use 80 MHz channels. In a particular BSS, only 40 MHz communications are seen. What is the likely cause of this behavior?

  A. The short guard interval is also enabled.

  B. The clients are all 802.11n STAs or lower

  C. The AP is improperly configured to use only 40 MHz of the 80 MHz allocated bandwidth

  D. All clients implement single spatial stream radios

  Correct Answer: C

• Question 7:

  You are evaluating a connection that states the data rate is 150 Mbps. What is the expected throughput of this connection?

  A. Less than 150 Mbps because of 802.11 overhead and contention

  B. 54 Mbps because that is the actual maximum throughput of an 802.11 connection

  C. More than 150 Mbps because of compression

  D. 150 Mbps because the data rate is equal to the throughput

  Correct Answer: A

• Question 8:

  What factor is likely to cause the least impact on the application layer throughput of an 802.11n client station in a 2.4 GHz HT BSS?

  A. Increasing or decreasing the number of spatial streams in use by the client station and AP

  B. Implementation of several other clients in the same BSS using 802.11 g radios

  C. Implementing Fast BSS Transition (FT) for roaming

  D. RF interface from more than 10 nearby Bluetooth transmitters

  Correct Answer: A

• Question 9:

  You support a WLAN using dual- band 802.11ac three stream access points. All access points have both the 2.4 GHz and 5 GHz radios enabled and use 40 MHz channels in 2.4 GHz. A manager is concerned about the fact that each access point is connected using a 1 Gbps Ethernet link. He is concerned that the Ethernet link will not be able to handle the load from the wireless radios. What do you tell him?

  A. His concern is valid and the company should upgrade all Ethernet link to 10 Gbps immediately.

  B. His concern is valid and the company should immediately plan to run a second 1 Gbps Ethernet link to each AP.

  C. Due to 802.11 network operations and dynamic rates used by devices on the network, the two radios will likely not exceed the 1 Gbps Ethernet link .

  D. His concern is invalid because the AP will compress all data before transmitting it onto the Ethernet link.

  Correct Answer: D

• Question 10:

  You are troubleshooting a controller-based AP that is unable to locate the controller. DHCP is not used and the controller is located at 10.10.10.81/24 while the AP is on the 10.10.16.0/24 network. What should be inspected to verify proper configuration?

  A. NTP

  B. BOOTH

  C. DNS

  D. AP hosts file

  Correct Answer: C