300-425 practice questions 21–30

1. Question 21 · 245 in bank

   An engineer is designing a wireless network to support hyperlocation in an environment that already has APs installed. During the survey, the engineer notices that the APs are pointing in different directions. What is the recommended way to align the APs to easily determine AP Azimuth, X-Y, and ceiling height information, and minimize confusion and user-entered errors?

   • AAPs must be aligned pointing toward the nearest wall.
   • BAPs must be aligned pointing toward each other.
   • CAPs must be aligned in the same direction.
   • DAPs can be aligned all four ways.

   Show answer

   Answer: C

   Explanation

   C Ideally you want to get the APs in a position where they are all aligned similar so you can easily determine "arrow" AP orientation , X-Y and ceiling height information and minimize confusion and user entered errors.

   Source: Adapted from community discussion — Eror79

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2. Question 22 · 245 in bank

   What causes the most signal attenuation, based on the wireless design tools?

   • Acinder block wall
   • Bmetal door
   • Cglass wall
   • Doffice window

   Show answer

   Answer: B

   Explanation

   Study guide Table 2-2 Common Obstacles and Their Estimated Attenuation Values Object in Signal Path Signal Attenuation Through the Object Plasterboard wall 3 dB Glass wall with metal frame 6 dB Cinderblock wall 4 dB Office window 1–3 dB Metal door 6 dB Brick wall 8 dB Concrete wall 12 dB Phone and body position 3–6 dB Phone near field absorption Up to 15 dB

   Source: Adapted from community discussion — skh

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3. Question 23 · 245 in bank

   An engineer is performing an active survey of a network that must support different types of mobile devices. The devices must be able to run an application that requires a minimum RF of 73 dBm. Which mobile device must be used for the survey?

   • Aone that has a receiver sensitivity of -70 dBm
   • Bone that has the lowest receiver sensitivity
   • Cone that has the most updated wireless card
   • Done that has 802.11a wireless support

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   Answer: B

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4. Question 24 · 245 in bank

   An engineer must produce a passive survey report. The coverage heat map shows the entire site with all signal levels. To see only the desired coverage, which action must the engineer take?

   • AChange the color scheme to show the desired heat map.
   • BUse the RSSI calibration tool to configure the receiver sensitivity.
   • CUse the RSSI slider to set the heat map to the desired cutoff filter.
   • DFilter the results to show the desired APs only.

   Show answer

   Answer: C

   Explanation

   The coverage overage area heatmap shows the span of the signal (in terms of area) and intensity of the signal. The RSSI cutoff is the lowest value of RSSI in dBM which is considered a usable signal and it is shown in dark blue color. RSSI cutoff value in rendering heat map, identifies the span over which the signal is higher than the specified RSSI cutoff value. https://www.cisco.com/c/en/us/td/docs/net_mgmt/prime/infrastructure/3-10/user/guide/ciscoprimeinfrastructure_3_10_userguide/use_wireless_site_maps.html#concept_0452BBBC2E544BCA94AB432F0BE42E10

   Source: Adapted from community discussion — crabb63

   References

   • Cisco documentation

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5. Question 25 · 245 in bank

   Select 2

   An engineer is performing an AP-on-a-stick survey and finds that the 5 GHz channel overlap is too high when an appropriate number of APs are used for the density requirements. Which two actions during the survey reduce channel overlap? (Choose two.)

   • ARaise the minimum data rate to 24 Mbps.
   • BIncrease AP transmit power to improve the SNR.
   • CAllow the use of UNII-2e channels.
   • DUse directional antennas to limit the coverage area of some APs.
   • EEnable power saving mode.

   Show answer

   Answer: CD

   References

   • Cisco documentation

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6. Question 26 · 245 in bank

   Select 2

   An engineer is designing a point-to-multipoint mesh network. Which two AP configurations must be completed for a site survey? (Choose two.)

   • AMAP hostnames
   • BRx power
   • Cmesh on 2.4 GHz band
   • Dbridge group name
   • ETx power

   Show answer

   Answer: BE

   References

   • Cisco documentation

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7. Question 27 · 245 in bank

   The wireless survey report shows APs staggered throughout a facility, with several of them placed on the exterior walls. Other APs are located at building corners and major turns in the structure layout. Assuming that all survey locations are optimized with a minimum of -67 RSSI at cell edges with 20% overlapping cells, for which purpose is this survey model used?

   • Alocation services, VoIP, data, and video
   • Bstreaming video with VoIP, data, and HD resolution
   • Clocation-based services, BYOD preparation, and HD video streaming
   • Dvoice, data clients, and video on demand

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   Answer: A

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8. Question 28 · 245 in bank

   An engineer must perform a predictive design for a wireless network. The customer has devices that can tolerate at most 100 ms of delay when roaming. Which design criteria must be used?

   • Alocation
   • Bdata
   • Cvideo
   • Dvoice

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   Answer: D

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9. Question 29 · 245 in bank

   A wireless engineer must assess constraints for a future WLAN deployment for a site that consists of office cubicles. Which signal propagation attenuation result is associated with this environment?

   • Areflection
   • Babsorption
   • Cnoise
   • Drefraction

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   Answer: B

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10. Question 30 · 245 in bank

    An engineer configured the optimized client roaming on Cisco WLC with an RSSI threshold of 72dBm. Clients report frequent disconnections. What must be configured for the AP to guide the client to a better AP?

    • AEnable BSS transition at the radio level and optimized roaming on the SSID.
    • BDisable coverage hole detection on the SSID and enable BSS transition on the SSID.
    • CDisable optimized roaming and enable 802.11v support on the SSID.
    • DEnable BSS transition on the SSID and optimized roaming at the radio level.

    Show answer

    Answer: D

    Explanation

    The BSS transition will help customer to move to the next AP in there roaming process. The BSS is enable on SSID and not on radio.

    Source: Adapted from community discussion — raresalexa_22

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300-425 practice, question 21. 245 questions available.