CWNA-108 試験問題を無料オンラインアクセス

You are troubleshooting a client problem with a 2.4 GHz WLAN connection. The client is experiencing surprisingly low data rates during the work day. You analyze the workspace outside of business hours and detect a strong signal with a typical noise floor at the client location. During working hours, the user works with a laptop in the area and uses an external USB hard drive for continuous data access. The user also states that the laptop works as expected on her home network. The user working approximately 8 feet away from this client experiences no problems.
Based on this information, what is the likely cause of the problem?

• A.The laptop has a failing wireless adapter
• B.The drivers in the laptop are corrupt
• C.The external hard drive is USB 3.0 and is causing a significant increase in the noise floor when in use
• D.The AP is overloaded during the work day

You are troubleshooting a problem with interference from a non-802.11 device. Given that the device is not a WLAN device, you cannot use a protocol analyzer and have chosen to use a spectrum analyzer. You want to view the signal from the interfering device over time to see the activity that is generating.
What common spectrum analyzer view should you use for this analysis?

• A.Real-time FFT
• B.APs
• C.Clients
• D.Waterfall/Spectrogram

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

• A.dBi
• B.dBm
• C.VSWR
• D.SNI

You must plan for POE in an office environment. Which one of these devices is least likely to be a POE PSE?

• A.Midspan multi-port injector
• B.VolP Phone
• C.Midspan injector
• D.Switch

You are reporting on the RF environment in your facility. The manager asks you to describe the noise floor noted in the report. Which of the following is the best explanation?

• A.The energy radiated by flooring materials that causes interference in the 2.4 GHz and 5 GHz bands.
• B.The noise caused by elevators, microwave ovens, and video transmitters.
• C.The RF energy that exists in the environment from intentional and unintentional RF radiators that forms the baseline above which the intentional signal of your WLAN must exist.
• D.The extra energy radiated by access points and client devices beyond that intended for the signal.