CWNA-107 Online Practice Questions and Answers

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

You are installing an AP to be used by 23 laptops. All laptops will connect on the 5 GHz frequency band. A neighbor network uses channels 1 and 6. What channel should be used for this AP and why?

A. Channel 6, because it is always best to use this channel

B. A 5 GHz channel, because channels 1 and 6 are 2.4 GHz channels they have no impact on the decision

C. Channel 1, because it is best to use the channel with the lowest frequency

D. Channel 11, because channels 1 and 6 are in use nearby

What primary metric of scanning can stations use to select the best AP for connectivity to the desired BSS?

A. Signal strength of AP beacons received.

B. PING latency when testing against an Internet server.

C. FCS errors in frames transmitted to and from the AP.

D. Throughput speed in Mbps.

Which unit of measurement is an absolute unit that is used to quantify received signal power levels on a logarithmic scale?

A. dBm

B. SNR

C. RSSI

D. VSWR

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

A. Yagl

B. Dipole

C. Rubber ducky

D. Isotropic radiator

When using a spectrum analyzer to look for non-Wi-Fi interference sources, you notice significant interference across the entire 2.4 GHz band (not on a few select frequencies) within the desktop area of a user's workspace, but the interference disappears quickly after just 2 meters. What is the most likely cause of this interference?

A. USB 3 device in the user's work area

B. Bluetooth devices in the user's work area

C. Excess RF energy from a nearby AP

D. Unintentional radiation from the PC power supply

You were previously onsite at XYZ's facility to conduct a pre-deployment RF site survey. The WLAN has been deployed according to your recommendations and you are onsite again to perform a post-deployment validation survey.

When performing this type of post-deployment RF site survey voice over Wi-Fi, what is an action that must be performed?

A. Spectrum analysis to locate and identify RF interference sources.

B. Frequency-band hopping analysis to detect improper RF channel implementations.

C. Protocol analysis to discover channel use on neighboring APs.

D. Application analysis with an active phone call on an VoWiFi handset.

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?

A. NTP issues

B. Hardware issues

C. IP routing issues

D. Captive portal issues

What wireless networking term describes the increase of RF energy in an intentional direction with the use of an antenna?

A. Directed Radiation

B. Active Amplification

C. Passive Gain

D. Beam Digression

A standard PoE injector is used to power an access point requiring 802.3at. CAT6 cabling is in use. What is the maximum distance supported between the access point and the Ethernet switch with the use of a midspan power injector?

A. 100 meters

B. 300 meters

C. 328 meters

D. 200 meters