CWNA-107 Online Practice Questions and Answers

When using a spectrum 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 users workspace, but the interference disappears quickly after just 2 meters. What is the most likely cause of this interference?

A. USB 3 devices 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 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

You are troubleshooting a controller-based AP that is unable to locate the controller. DHCP is not use 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

What is an advantage of using WPA2-Personal instead of WEP-128 as a security solution for 802.11 networks?

A. WPA2-Personal uses CCMP for encryption, and WEP-128 uses TKIP for encryption

B. WPA2-Personal uses dynamic encryption keys, and WEP-128 uses static keys

C. WPA2-Personal uses 802.1X/EAP for authentication, and WEP-128 uses preshared keys

D. WPA2-Personal is based on IEEE 802.11 industry standards, but WEP is not

When using an RF splitter to connect one transceiver to sector antennas loss is incurred. What is this loss called?

A. Conversion loss

B. Intentional loss

C. Through loss

D. Active loss

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

In an 802.11n 2.4 GHz BSS, what prevents each station from using the full network data rate (e.g. 216.7 Mbps) for user data when multiple clients are actively exchanging data with the AP?

A. Half of the bandwidth is allocated to uplink traffic and half to downlink traffic

B. All data frames must be acknowledged and the medium is shared

C. Radio receiver hardware cannot process data is quickly as it can be transmitted

D. APs do not have sufficient wired connection speeds to the LAN, even at 1 Gbps connections, with 802.11n and earlier APs

You are performing a post-implementation validation survey. What basic tool can be used to easily locate areas of high co-channel interference?

A. Throughput tester

B. Access point spectrum analyzer

C. Laptop-based spectrum analyzer

D. Wi-Fi scanner

What common feature of MDM solutions can be used to protect enterprise data on mobile devices?

A. Over-the-air registration

B. Onboarding

C. Containerization

D. Self-registration

A non-802.11 device is suspected of causing interference on the WLAN. You are not certain of the location or type of device. What is the best solution for locating this non-802.11 device?

A. Access point spectrum analyzer

B. Laptop-based spectrum analyzer with an omni-directional antenna

C. Laptop-based spectrum analyzer with a directional antenna.

D. Laptop-based spectrum analyzer with an omni-directional antenna.