CWNA-107 Online Practice Questions and Answers

Return Loss is the decrease of forward energy in a system when some of the power is being reflected back toward the transmitter.

What will cause high return loss in an RF transmission system, including the radio, cables, connectors and antenna?

A. The use of cables longer than one meter in the RF system

B. High output power at the transmitter and use of a low-gain antenna

C. A Voltage Standing Wave Ratio (VSWR) of 1:1

D. An impedance mismatch between components in the RF system

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 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 802.11 network configuration would result in multiple stations broadcasting Beacon frames with the same BSSID but with different source addresses?

A. A single AP supports multiple BSSs with different SSIDs.

B. An SCA network is in use.

C. Multiple APs have been loaded with the same configuration from an image file.

D. An IBSS is used instead of a BSS.

You recently purchased four laptops containing dual-band 802.11ac adapters. The laptops can connect to your 2.4 GHz network, but they cannot connect to the 5 GHz network. The laptops do not show the 5 GHz SSIDs, which are different that the 2.4 GHz SSIDs. Existing devices can connect to the 5 GHz SSIDs with no difficulty. What is the likely problem?

A. Interference from no-Wi-Fi sources

B. Faulty drivers

C. DoS attack

D. Interference from other WLANs

When an ACK frame is not received by the transmitting STA, what is assumed?

A. The frame was correctly delivered

B. The frame was not delivered and must be retransmitted

C. The receiver is offline

D. The receiver processed the frame, but did not respond with an ACK frame because 802.11w is enabled

You are deploying a WLAN monitoring solution that utilizes distributed sensor devices. Where should sensors be deployed for best results?

A. Every 20 feet and alongside each AP

B. Closer to the APs

C. Closer to the client devices

D. In critical areas where WLAN performance must be high

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.

What statement about 802.11 WLAN performance is true?

A. In modern networks, both centralized and distributed data forwarding work well for most standard office deployments

B. In most WLANs, no special skill or tuning is required to get peak performance

C. WLANs perform better as more wireless clients connect with each AP

D. To get the best performance out of an AP, you should disable data rates of 72 Mbps and lower

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?

A. Beacon frames transmitted by the AP

B. Data frames sent between the AP and current clients STAs

C. Authentication frames transmitted by the other client STAs

D. Probe request frames transmitted by other client STAs