Which Spectrum Analyzer plot would show the percentage of time a signal is measured at a particular frequency?
Answer(s): B
A Real-Time FFT plot shows the percentage of time a signal is present at specific frequencies. This allows you to see how often energy appears at a given frequency, making it useful for identifying intermittent or periodic transmissions.
Explain the protocol behavior that can be known in the following graphic?
Answer(s): A
The capture shows repeated RTS, CTS, and BA frame exchanges between the same client and AP addresses, but no data frames are visible. This occurs in Single Channel Architecture (SCA), where multiple AP radios operate on the same channel and coordinate transmissions using control frames while data traffic is tunneled and not visible in the capture. This explains why only management/control frames appear, not the actual data traffic.
You have been hired to troubleshoot a WLAN problem for a government organization. You intended to use a Protocol Analyzer as part of your troubleshooting methodology; however, the customer is concerned about you capturing sensitive data transmitted over the network.Which common protocol analyzer feature could you use to address this concern?
Answer(s): D
Packet slicing allows the capture tool to record only the initial bytes of each frame (such as MAC headers) while discarding the payload. This ensures that sensitive user data is not captured, addressing security concerns while still providing enough information for WLAN troubleshooting.
Your organization would like to give their network field engineers a tool to provide an overview of a given wireless LAN environment. They are interested in how many SSIDs are enabled per radio, channels used, and the number of APs per channel. They do not want to require the engineers to view multiple frames to determine the information.Which tool would you recommend that provides this information at the lowest cost?
Answer(s): C
A WLAN scanner is the lowest-cost tool that quickly shows SSIDs per radio, channel usage, and the number of APs per channel without requiring detailed frame analysis. It provides a clear overview of the WLAN environment, making it ideal for field engineers.
You are troubleshooting an intermittent problem with some WLAN VoIP phones resulting in dropped calls. You configure your capture on a fixed channel matching the current operating channel of a test phone. So far, you have been unsuccessful in capturing the problem because the VoIP phone always roams to another AP before the problem occurs.What would be the best setup for your packet capture to make sure you capture the problem?
Since the VoIP phone roams across APs and channels, a single-channel capture risks missing the problem. Using multiple adapters with channel aggregation ensures simultaneous monitoring of all relevant channels, guaranteeing that the roaming event and dropped call behavior are fully captured for analysis.
Which field, within a protocol analyzer, records the time at which a frame entered the capture buffer?
The absolute time field in a protocol analyzer records the exact timestamp when a frame entered the capture buffer. This allows correlation of events across captures and is critical for analyzing sequence and timing in WLAN troubleshooting.
What feature of protocol analyzers shows a visual representation of who is communicating with whom, by connecting communicating nodes with a line?
A peer map in a protocol analyzer visually represents communication relationships by connecting nodes with lines, making it clear which devices are exchanging frames with each other.
Which one of the following tools would be the best to most accurately measure the noise floor?
A spectrum analyzer directly measures RF energy across the frequency range, providing the most accurate measurement of the noise floor. This is essential for identifying interference and assessing channel conditions.