1.11 Describe Wireless Principles 200-301 Practice Questions (Page 5)

Questions 21–25

1. 21expert · hard

   A network engineer is troubleshooting a wireless link between two buildings. The link is 300 meters long and uses 5 GHz directional antennas. The link works but has high packet loss during rain. Which RF principle explains this?

   • ARain causes multipath interference by reflecting the signal.
   • BRain increases the amplitude of the signal, causing distortion.
   • CRain changes the wavelength of the signal, causing it to bend.
   • DRain droplets absorb and scatter higher-frequency signals, causing attenuation.
   Reveal Solution Discussion Select an answer first
2. 22application · easy

   A network admin is setting up two APs in a small office. One AP is on channel 1, the other on channel 6. A third AP is added. Which channel should be used for the third AP to minimize interference with both existing APs?

   • AChannel 11
   • BChannel 1
   • CChannel 3
   • DChannel 6
   Reveal Solution Discussion Select an answer first
4. 23application · medium

   A company is deploying a new wireless network for IoT devices that only support WPA2-PSK. The security policy requires that each device use a unique pre-shared key. Which approach meets this requirement without replacing the devices?

   • ACreate a separate SSID for each device with its own PSK.
   • BEnable MAC filtering and use the same PSK.
   • CUse WPA3-SAE with a single passphrase.
   • DUse a single SSID with a single PSK for all devices.
   Reveal Solution Discussion Select an answer first
5. 24application · medium

   A network engineer is designing a wireless link between two buildings 200 meters apart. The link must carry data reliably, but the path has several trees that may obstruct the signal. Which RF characteristic is most important to consider when selecting the frequency for this link?

   • ALower frequency signals have shorter wavelength and diffract less around obstacles.
   • BHigher frequency signals have shorter wavelength and are absorbed more by obstacles.
   • CAmplitude determines the frequency of the signal, so higher amplitude is needed for longer links.
   • DWavelength is inversely proportional to frequency, so lower frequency signals have less range.
   Reveal Solution Discussion Select an answer first
6. 25application · medium

   A retail store uses WPA2-PSK for its employee Wi-Fi. The store manager wants to prevent customers from guessing the password by brute force. Which additional measure would most effectively mitigate this risk while keeping the current encryption method?

   • AUse WEP instead of WPA2 to make the encryption simpler.
   • BReduce the transmit power so the signal does not reach the customer area.
   • CChange the PSK to a long random passphrase and enable a captive portal for employees.
   • DDisable SSID broadcast so the network is hidden from customers.
   Reveal Solution Discussion Select an answer first