300-425 practice questions 141–150

1. Question 141 · 245 in bank

   

   Refer to the exhibit. What is the main reason why the Wi-Fi design engineer took a different approach than installing the APs in the offices, even though that installation provides better coverage?

   • Aaesthetics
   • Btransmit power considerations
   • Cantenna gain
   • Dpower supply considerations

   Show answer

   Answer: A

   Explanation

   Right answer is A. https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/WiFiLBS-DG/wifich5.html FiGure 5-6 For aesthetic reasons, facilities management has decided that access points will not be placed within any of the executive offices or conference rooms located between the hallway corridors and the physical perimeter. Because of these restrictions, our convex hull now lies at the outside edge of the corridor (indicated by the blue rectangle) and not at the true physical perimeter of the floor.

   Source: Adapted from community discussion — Cyrillka

   References

   • Cisco documentation
   • cisco.com documentation

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2. Question 142 · 245 in bank

   Where must the APs be mounted when used in a high-density wireless network to provide 6 dB to 20 dB of attenuation to a cell?

   • Ain the aisle
   • Bunder the seat
   • Cabove the stage
   • Dunder the stage

   Show answer

   Answer: B

   Explanation

   Source: https://www.cisco.com/c/dam/en_us/solutions/industries/docs/education/cisco_wlan_design_guide.pdf Under seat or under desk mounting can provide from 6 dB to 20 dB of attenuation to the cell, depending on the openness of the mounting options.

   Source: Adapted from community discussion — ContactScott

   References

   • Cisco documentation

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3. Question 143 · 245 in bank

   A company wants to replace its existing PBX system with a new VoIP System that will include wireless IP phones. The CIO has concerns about whether the company's existing wireless network can support the new system. Which tool in Cisco Prime can help ensure that the current network will support the new phone system?

   • ALocation Readiness
   • BSite Calibration
   • CMap Editor
   • DVoice Readiness

   Show answer

   Answer: D

   Explanation

   D - https://www.cisco.com/c/en/us/td/docs/net_mgmt/prime/infrastructure/3-4/user/guide/bk_CiscoPrimeInfrastructure_3_4_0_UserGuide/bk_CiscoPrimeInfrastructure_3_4_0_UserGuide_chapter_01010.html "The voice readiness tool allows you to check the RF coverage to determine if it is sufficient for your voice needs. This tool verifies RSSI levels after access points have been installed."

   Source: Adapted from community discussion — EGD

   References

   • Cisco documentation

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4. Question 144 · 245 in bank

   A rapidly expanding company has tasked their network engineer with wirelessly connecting a new cubicle area with Cisco workgroup bridges until the wired network is complete. Each of 42 new users has a computer and VoIP phone. How many APs for workgroup bridging must be ordered to keep cost at a minimum while connecting all devices?

   • A4
   • B5
   • C6
   • D7

   Show answer

   Answer: B

   Explanation

   looking at the “42” number, but indeed since it mentions computer + VoIP =84 It’s 5. Workgroup bridges support 20 cliens maximum.

   Source: Adapted from community discussion — skh

   References

   • Cisco documentation
   • Cisco documentation
   • cisco.com documentation
   • cisco.com documentation

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5. Question 145 · 245 in bank

   A high-density wireless network is designed. Which Cisco WLC configuration setting must be incorporated in the design to encourage clients to use the 5 GHz spectrum?

   • ABand Select
   • BRRM
   • CCisco Centralized Key Management
   • Dload balancing

   Show answer

   Answer: A

   Explanation

   Band Select or Band Direction The 2.4-GHz band is often congested. Clients on this band typically experience interference from Bluetooth devices, microwave ovens, and cordless phones as well as co-channel interference from other access points because of the 802.11b/g limit of three non-overlapping channels. You can use this feature to combat these sources of interference and improve overall network performance. Band direction enables client radios that are capable of dual-band (2.4- and 5-GHz) operation to move to a less congested 5-GHz access point. https://community.cisco.com/t5/wireless-mobility-documents/load-balancing-and-band-select-on-the-cisco-wireless-lan/ta-p/3128513

   Source: Adapted from community discussion — skh

   References

   • cisco.com documentation
   • Cisco documentation

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6. Question 146 · 245 in bank

   A wireless network consultant must assess an existing wireless LAN controller. Which section must the consultant check before replacing the old APs with APs that are IEEE 802.11ac-capable?

   • Anumber of AP licenses
   • Bcontroller PSU
   • Cthroughput capacity
   • Dsoftware version

   Show answer

   Answer: D

   Explanation

   I think it is D, since newer APs might not be compatible with older WLC software. Also, if you replace each old AP by a new one, the licenses should remain the same

   Source: Adapted from community discussion — antmich

   References

   • Cisco documentation
   • Cisco documentation

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7. Question 147 · 245 in bank

   Clustering Cisco WLCs into a single RF group enables the RRM algorithms to scale beyond the capabilities of a single Cisco WLC. How many WLCs and APs in an RF group can the controller software scale up to in WLC release 8.9 depending on the platform?

   • Aup to 20 WLCs and 1000 APs
   • Bup to 20 WLCs and 3000 APs
   • Cup to 20 WLCs and 4000 APs
   • Dup to 20 WLCs and 6000 APs

   Show answer

   Answer: D

   Explanation

   book study guide NOTE A single RF group can contain up to 20 WLCs. Depending on the WLC platform, a single RF group can contain up to 6,000 APs.

   Source: Adapted from community discussion — skh

   References

   • Cisco documentation
   • Cisco documentation

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8. Question 148 · 245 in bank

   An engineer must speed up the reauthentication delays that are being experienced on the wireless infrastructure by deploying a key-caching mechanism. Which mechanism must be configured?

   • APEAP
   • BFT
   • CPMF
   • DGTK-randomization

   Show answer

   Answer: B

   Explanation

   802.11r An amendment to the 802.11 standard that defines a method of fast BSS transition (FT). Clients capable of FT associate normally and then can reassociate very quickly by using a special FT 4-way handshake during the authentication and reassociation exchanges with subsequent APs.

   Source: Adapted from community discussion — skh

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9. Question 149 · 245 in bank

   Select 2

   A wireless engineer is designing a wireless network for a warehouse using access points with internal antennas. Which two elements have a negative effect on the wireless users? (Choose two.)

   • Awireless channels
   • Baccess point height
   • Cclient authentication
   • Dclient authorization
   • Eabsorption

   Show answer

   Answer: BE

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10. Question 150 · 245 in bank

    A customer is concerned about mesh backhaul link security. Which level of encryption does the backhaul link use?

    • Ahash
    • BAES
    • CWEP
    • D3DES

    Show answer

    Answer: B

    Explanation

    B - 'This traffic is always AES encrypted when it crosses a wireless mesh link such as a wireless backhaul' https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/8-8/b_mesh_88/b_mesh_88_chapter_010.html

    Source: Adapted from community discussion — RogerTheLodger

    References

    • Cisco documentation

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300-425 practice, question 141. 245 questions available.