Practice Free CWNA-109 Exam Online Questions
Using knowledge of RF characteristics and behaviors, which two options should a WLAN engineer be most concerned about during an indoor site survey? (Choose all that apply.)
- A . Brick walls
- B . Indoor temperature
- C . Wood-lath plaster walls
- D . Drywall
Which technologies use the RC4 cipher? (Choose all that apply.)
- A . Static WEP
- B . Dynamic WEP
- C . CCMP
- D . TKIP
- E . MPPE
Which technologies use the RC4 cipher? (Choose all that apply.)
- A . Static WEP
- B . Dynamic WEP
- C . CCMP
- D . TKIP
- E . MPPE
For what likely reasons might an organization choose to purchase an AP designed for outdoor deployment to use as an indoor WLAN AP at an industrial facility? (Choose 2)
- A . Aesthetic requirements
- B . Physical security and theft prevention
- C . Protection from environmental conditions
- D . Reduce transient RF interference
- E . 802.11 security compliance
Which of the following tools might be used in an outdoor site survey used to provide outdoor coverage? (Choose all that apply.)
- A . Spectrum analyzer
- B . Outdoor blueprints or topography map
- C . Mesh routers
- D . GPS
What would cause an 802.11 station to retransmit a unicast frame? (Choose all that apply.)
- A . The transmitted unicast frame was corrupted.
- B . The ACK frame from the receiver was corrupted.
- C . The receiver’s buffer was full.
- D . The transmitting station will never attempt to retransmit the data frame.
- E . The transmitting station will send a retransmit notification.
During a site survey of a point-to-point link between buildings at a manufacturing plant, the WLAN engineer determines that the noise floor is extremely high because of all the machinery that is operating in the buildings.
The engineer is worried about a low SNR and poor performance due to the high noise floor.
What is a suggested best practice to deal with this scenario?
- A . Increase the access points’ transmission amplitude.
- B . Mount the access points higher.
- C . Double the distance of the AP signal with 6 dBi of antenna gain.
- D . Plan for coverage cells with a 5 dB fade margin.
- E . Increase the transmission amplitude of the client radios.
As you prepare for a site survey in a multi-floor corporate office, you have learned about several wireless devices that support connection-oriented, real-time applications.
These applications are sensitive to service interruptions and require excellent signal quality, low latency, and low loss. For that reason, it is important to identify sources of RF interference as well as building characteristics that would cause RF blockage or dead spots.
What systems or environmental characteristics are most likely to cause interference or RF blockage and disrupt service for these applications? (Choose 2)
- A . Microwave ovens
- B . Narrow hallways
- C . Elevator shafts
- D . RFID chokepoints
- E . Workspace dividers
The 802.11-2012 standard defines which two technologies for quality of service (QoS) in a WLAN?
- A . EDCA
- B . PCF
- C . Hybrid Coordination Function Controlled Channel Access
- D . VoIP
- E . Distributed Coordination Function
- F . VoWiFi
What are some operational modes in which an AP radio may be configured? (Choose all that apply.)
- A . Scanner
- B . Root
- C . Bridge
- D . Mesh
- E . Repeater