NEW QUESTION 1
What two factors could cause a post-deployment audit to show a high retransmission rate for the WLAN? (Choose two.)

• A. CRC errors
• B. Rate shifting
• C. CCX compatible clients
• D. High SNR values
• E. High RSSI values

Answer: AB

NEW QUESTION 2
An engineer is determining powering requirements for a P2P wireless link using Cisco Aironet 1572EC access points.
Which power method is valid for the access point?

• A. 802.3af Power over Ethernet
• B. Power over Cable
• C. Cisco Inline Power
• D. 802.3at Power over Ethernet

Answer: B

NEW QUESTION 3
You are designing a wireless network to support voice and video applications. The customer is requesting to use the 2.4 Ghz band only because they primarily use 802.11b legacy devices. Which two must be considered? (Choose two.)

• A. Disable the data rates below 11 Mbps and set the rest as supported.
• B. Set the mandatory data rate to 11 Mbps.
• C. Set the mandatory data rate to 12 Mbps.
• D. Disable the data rates below 12 Mbps and set the rest as supported.
• E. Set the mandatory data rate to 5.5 Mbps.

Answer: BE

NEW QUESTION 4
Which three factors must you consider before you deploy APs to a wireless network located in a warehouse? (Choose three.)

• A. conveyor belts
• B. employee schedules
• C. ceiling height
• D. variable inventory quantities
• E. types of walls
• F. deliveries

Answer: BCE

NEW QUESTION 5
A wireless engineer is doing a pre-site survey. Which two attributes must match between the site survey and the production clients? (Choose two.)

• A. AP type
• B. radio frequency
• C. mobility patterns
• D. user
• E. exact location

Answer: CD

NEW QUESTION 6
You are planning the coverage for wireless VoIP by using Ekahau. Which signal strength does Ekahau recommend using for VoIP?

• A. -84 dBm
• B. -76 dBm
• C. -67 dBm
• D. -53 dBm

Answer: C

Explanation: Each vendor has their own recommended signal strength for a given data rate or application. For instance, one vendor may recommend designing their VoIP solution at -67 dBm (perhaps the most widely-used value for VoIP deployment if I had to choose one), while another may say -70 dBm. In most cases the values will differ only by a couple dB.
https://www.ekahau.com/blog/2015/01/13/ekahau-site-survey-heatmap-visualizations-part-2-signalstrength/

NEW QUESTION 7
An engineer must perform a survey where the target client devices range from standard Wi-Fi-equipped laptops, consumer handhelds and tablets, and low power tracking tags limited to 12 mW Tx power. With which setting should the survey AP be configured?

• A. local power 11
• B. local power 5
• C. local power 14
• D. local power 8

Answer: B

NEW QUESTION 8
An engineer must implement a cabling infrastructure that supports speeds up to 10G, can run a good distance before cable loss, and can support IEEE8.2.11ac speeds. Which infrastructure satisfies these requirements?

• A. CAT 5E cables
• B. CAT 3 cables
• C. CAT 5 cables
• D. CAT 6A cables

Answer: D

NEW QUESTION 9
A network engineer is having wireless multicast fail when it hits the wired network. What command will show the source of multicast groups for troubleshooting?

• A. show ip igmp
• B. show ip mroute
• C. show ip mcache
• D. show ip interface counts
• E. show ip route

Answer: B

NEW QUESTION 10
Which option is an advantage at using Cisco CleanAir technology in your wireless network?

• A. CleanAir can be used on an AP in monitor mode so that the AP serves client traffic and monitors for interference simultaneously.
• B. A single CleanAir AP can be used to analyze RF traffic from many APs
• C. CleanAir is a software feature that can be added to arty AP to start monitoring interference and air quality.
• D. CleanAir operates 24/7 and constantly monitors for interference and air quality issues.

Answer: D

Explanation: An advantage of CleanAir technology is that it operates 24/7, constantly monitoring for interference and air quality issues (see Figure 2). This allows IT to take a more proactive approach to spectrum management.
Instead of waiting for interference to be reported by an end user (in the form of a trouble ticket) and then dispatching a tool to analyze the problem, IT can find interference as soon as it occurs and take immediate action. Having a 24/7 history also makes it possible to look back in time. Using historical data, it's easy to perform analyses of trends over time.
https://www.cisco.com/c/en/us/solutions/collateral/enterprise-networks/cleanairtechnology/white_paper_c11-59

NEW QUESTION 11
IEEE 802.11r-2008 or fast BSS transition (FT), also called "fast roaming," Which 802.11 standard performs the PTK calculations in advance to enable fast client roaming?

• A. 802.1 11r
• B. 802.1 11i
• C. 802.1 11k
• D. 802 1 11w

Answer: A

Explanation: 802.11 r, which is the IEEE standard for fast roaming, introduces a new concept of roaming where the initial handshake with the new AP is done even before the client roams to the target AP, which is called Fast Transition (FT). The initial handshake allows the client and APs to do the Pairwise Transient Key (PTK) calculation in advance. These PTK keys are applied to the client and AP after the client does the reassociation request or response exchange with new target AP.
https://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/80211r-ft/b-80211r-dg.html

NEW QUESTION 12
ACisco 7925 phone at a client’s location is not registering with CUCM. The engineer analyzes a packet capture, sees that the phone receives an IP, and downloads the proper configuration file from TFTP successfully. What type of messages should the phone be sending at this point?

• A. H.245
• B. H.323
• C. MCGP
• D. SCCP

Answer: D

NEW QUESTION 13
A customer is preparing to deploy a wireless network in a stadium and is identifying coverage area requirement for the patrons in suite areas.
Which two attributes are relevant to determining these coverage requirements? (Choose two.)

• A. hours’ d operon
• B. encryption type
• C. authentication type
• D. number of uses
• E. device types

Answer: CE

NEW QUESTION 14
Which option is the minimum RSSI signal for a data WLAN?

• A. -65 dBm
• B. -67 dBm
• C. -72 dBm
• D. -80 dBm

Answer: D

NEW QUESTION 15
An engineer is assigned to provide wireless coverage in a provincial capital building. Due to the age and historic nature of the building, the ability to run new copper Ethernet cable to desired AP locations is limited. Which requirement should the engineer specify to overcome this restriction?

• A. Deploy access points where the survey indicates and connect them via fiber optic cable, using a media adapter, and locally provide power.
• B. Deploy access points to each phone location converting two spare pairs of copper from the phone line to Ethernet and locally provide power.
• C. Deploy access point devices where limited cable can be run or exists and connect high-gain antennas and increase Tx power to increase cell size.
• D. Deploy RAP where limited cable can be run or exists, and extend coverage using MAP.

Answer: D

NEW QUESTION 16
Clients are experiencing artifacts in multicast video even though the network was recently upgraded to 802.11n APs. What three configuration changes will be most effective to improve performance? (Choose three.)

• A. increase mandatory data rate
• B. enable 40 MHz wide channels
• C. enable Call Admission Control
• D. increase QoS marking on multicast
• E. enable VideoStream
• F. disable Multicast Messaging

Answer: BCE

NEW QUESTION 17
An engineer has performed a post-deployment site survey and noticed that access points were installed in
suboptimal locations due to physical restrictions and obstacles. Which action must the engineer take to resolve this deployment issue?

• A. Set DCAChannel Assignment Method to freeze.
• B. Set all Auto RE parameters to factory default
• C. Set TPC maximum and minimum power levels.
• D. Set static channels on all AP radios.

Answer: C

Explanation: Suspect poor coverage/not enough AP density -- If AP transmit power is already at the maximum, you can enable the lower data rates to allow clients to connect from farther away. This has a negative impact on performance, but it can help the customer understand that additional APs might be necessary. https://www.cisco.com/c/en/us/support/docs/wireless/5500-series-wireless-controllers/116057-site-survey - guidelineswlan-00.html