CWNA-109

CWNA-109 practice questions, page 2 of 5, with answer review and explanations.

Question 6

You administer a WLAN that offers a guest SSID of GUESTNWORK. Users connect to the GUESTNWORK SSID, but report that they cannot browse the Internet. The devices simply report no Internet connection. What common problem causes this scenario?

  1. NTP issues
  2. SSL/TLS websites
  3. TFTP issues
  4. Captive portal issues

Question 7

AS an RF wave propagates through space, the wave front experiences natural expansion that reduces its signal strength in any specific remote area. What describes the rate at which this expansion happens?

  1. Frontwave thinning theory
  2. Ohm's law
  3. Return loss or through loss
  4. Inverse square law

Question 8

A client STA must choose the best AP for connectivity. As part of the evaluation, it must verify compatible data rates. What can the client STA use to verify that an AP supports the same data rates that it supports?

  1. Probe request frames transmitted by other client STAs
  2. Beacon frames transmitted by the AP
  3. Authentication frames transmitted by the other client STAs
  4. Data frames sent between the AP and current client STAs

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 5 GHz and 20 MHz channels in 2.4 GHz with one of each radio operational. 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?

  1. His concern is invalid because the AP will compress all data before transmitting it onto the Ethernet link.
  2. 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 Gbps Ethernet link.
  3. His concern is valid and the company should immediately plan to run a second 1 Gbps Ethernet link to each AP.
  4. His concern is valid and the company should upgrade all Ethernet links to 10 Gbps immediately.

Question 10

ABC Company is planning to install a new 802.11ac WLAN, but wants to upgrade its wired infrastructure first to provide the best user experience possible. ABC Company has hired you to perform the RF site survey. During the interview with the network manager, you are told that the new Ethernet edge switches will support VoIP phones and 802.11 access points, both using 802.3 PoE. After hearing this information, what immediate concerns do you note?

  1. The edge Ethernet switches should support Ether-channel to get the best results out of the network
  2. VoIP phones and 802.11 access points should not be powered by the same edge switch due to distortion
  3. If the switches are in optimal locations for VoIP phones, they are likely to be suboptimal locations for 802.11 APs
  4. The power budget in the edge switches must be carefully planned and monitored based on the number of supported PoE devices