Practice Free CWNA-109 Exam Online Questions
Andrew Garcia, the WLAN administrator, is trying to explain to his boss that the WLAN is not the reason that Andrew’s boss cannot post on Facebook. Andrew has determined that the problem does not exist at layer 1 or layer 2 of the OSI model.
What should Andrew say to his boss? (Choose the best answer.)
- A . Wi-Fi operates only at layer 1 and layer 2 of the OSI model. The WLAN is not the problem.
- B . The problem is most likely a networking problem or an application problem.
- C . Do not worry, boss; I will fix it.
- D . Why are you looking at Facebook during business hours?
23 dBm is equal to how many mW?
- A . 200 mW
- B . 14 mW
- C . 20 mW
- D . 23 mW
- E . 400 mW
In an enterprise WLAN, what condition will prevent a dual-band VHT/HT client device from performing a fast and seamless transition (i.e. latency-sensitive applications are not disrupted) between two access points that are managed by the same WLAN controller?
- A . The current AP is using channel 1 and the new AP is using channel 40.
- B . The SSID of the current AP does not match the SSID of the new AP.
- C . The current AP supports only HT and the new AP is VHT capable.
- D . The access points are hiding the SSID in Beacons and Probe Response frames.
The height or power of a wave is known as what?
- A . Phase
- B . Frequency
- C . Amplitude
- D . Wavelength
A WLAN transmitter that emits a 400 mW signal is connected to a cable with a 9 dB loss. If the cable is connected to an antenna with 19 dBi of gain, what is the EIRP?
- A . 4 W
- B . 3,000 mW
- C . 3,500 mW
- D . 2 W
The 802.11ac amendment defines a maximum of how many spatial streams for an AP, and how many maximum devices can an AP communicate with at once?
- A . One spatial stream, four devices
- B . One spatial stream, eight devices
- C . Four spatial streams, four devices
- D . Eight spatial streams, four devices
- E . Eight spatial streams, eight devices
The TV white space (TVWS) frequencies operate between 54 MHz and 790 MHz, use a new PHY known as TVHT, and are defined by which 802.11 amendment?
- A . 802.11af
- B . 802.11y
- C . 802.11a
- D . 802.11aa
- E . 802.11ad
The TV white space (TVWS) frequencies operate between 54 MHz and 790 MHz, use a new PHY known as TVHT, and are defined by which 802.11 amendment?
- A . 802.11af
- B . 802.11y
- C . 802.11a
- D . 802.11aa
- E . 802.11ad
2 dBd is equal to how many dBi?
- A . 5 dBi
- B . 4.41 dBi
- C . 4.14 dBi
- D . The value cannot be calculated.
During the discovery and connectivity process, client and AP stations exchange information about their supported data rates.
After the association, how do client and AP stations select the supported data rate that will be used to send an 802.11 data frame?
- A . During the association, the client and AP agree to use the same transmit rate, but either station can request a change at any time after the association.
- B . The client and AP each choose the optimal data rate to use independently of one another, based on their own measurements related to the RF link.
- C . The client and AP may use different transmit rates, but the AP determines the data rate that will be used by each client station in the BSS.
- D . The client and AP may use different transmit rates, but the client determines the data rate that it will use and the data rate that the AP will use when communicating to the client.
- E . The client and AP may use a different transmit rates, but the transmit rate is determined by the peer station, based on the peer’s experience of the RF link.