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Q1. A cabling contractor is working at a customer facility. The contractor is asking what rating of cable should be installed in return-air areas. Which information can be referenced to provide the contractor the requested information?
A. OSHA Codes
B. BICSI TDDM
C. NEC Ratings
D. IEEE Standards
Answer: B
Q2. An engineer is determining the signal levels for the wireless cells. Which signal-to-noise ratio is an optimal configuration to achieve?
A. minimum SNR of -33 dBm
B. minimum SNR of -25 dBm
C. minimum SNR of 25 dB
D. minimum SNR of 33 dB
Answer: C
Explanation:
The minimum recommended wireless signal strength for voice applications is -67 dBm and the minimum SNR is 25 dB.
Reference: http://www.cisco.com/c/en/us/support/docs/wireless/5500-series-wireless-controllers/116057-sitesurvey-guidelines-wlan-00.html
Q3. An engineer must design wireless coverage in thick-walled stairwells. Which information should the engineer refer to when determining where APs can be installed?
A. Local or National Building Code
B. IEEE
C. BICSI TDMM
D. Cisco Hardware Installation Guide
Answer: D
Q4. While performing a Layer 1 passive wireless site survey of a location an engineer detects several instances of low power frequency hopping interference, but cannot physically locate the interfering device or devices. Why is the engineer unable to locate the offending device or devices?
A. The sources are nearby narrow-beam radar and are sweeping through the facility.
B. The sources are PAN and are mobile.
C. The sources are above the ceiling file and transmit intermittently.
D. The sources are actually high-powered devices and transmit from off the site.
Answer: B
Q5. An engineer is deploying centralized wireless solution with a 5508 controller. What is the most AP licenses that can be supported?
A. 100
B. 250
C. 1000
D. 500
Answer: D
Explanation:
You can order Cisco 5500 Series Controllers with support for 12, 25, 50, 100, 250 or 500 APs as the controller's base capacity. You can add additional AP capacity through capacity adder licenses available at 25, 50, 100 and 250 AP capacities. You can add the capacity adder licenses to any base license in any combination to arrive at the maximum capacity of 500 APs.
Reference: http://www.cisco.com/c/en/us/support/docs/wireless/5500-series-wireless-controllers/112926-5508wlc-license.html
Q6. A Cisco 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
Q7. An engineer is preparing for an indoor wireless LAN survey and is provisioning a survey kit. Which three pieces of equipment should be included? (Choose three.)
A. external connector access point
B. integrated antenna access point
C. coax low-loss cable
D. battery operated power supply
E. range finder
F. Yagi antennas
Answer: B,D,E
Q8. A customer wants to implement a wireless network in a historic location, but is concerned about the structural and aesthetic impact to the facility. Which benefit of using wireless mesh addresses these concerns?
A. Power is required only at the installation location.
B. The APs do not have LED lights.
C. More wireless channels can be supported.
D. APs do not need network connections.
Answer: D
Q9. When designing a WLAN, AP placement is important. Which option describes how to rank the density of APs needed to support location services versus data and voice services?
A. Data services have the lowest density of APs compared to location services, which has the highest density.
B. Data services have a lower density of APs compared to location services, but more than voice.
C. Voice services have the highest density of APs over location and data services.
D. Voice and data services require a higher density of APs than location services.
Answer: A
Q10. After the completion of a site survey with Ekahau Site Survey tool, using the default color palette, it is noted that multiple areas are shown as white on the heat map when viewing 5 GHz signal strength data. What does this indicate about the signal strength?
A. The area is below the minimum threshold configured on the tool.
B. The area is below the detectable level and indicates no RF signal.
C. The area is below -100 dBm at coverage cell edge.
D. The area is below -67 dBm at coverage cell edge.
Answer: A
Q11. An engineer is tuning RRM parameters to improve client connectivity. Which channel band results in the best 802.11n client compatibility?
A. UNII-2
B. UNII-2e
C. UNII-3
D. UNII
E. UNII-1
Answer: E
Explanation:
802.11n operates on the same channel as 802.11a. For better compatibility with 802.11n clients, it is recommended to stay on lower channels (UNII-1 band).
Reference: http://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/108184config-802-11n-wlc.html
Q12. 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 mediaadapter, and locally provide power.
B. Deploy access points to each phone location converting two spare pairs of copper from the phone line toEthernet and locally provide power.
C. Deploy access point devices where limited cable can be run or exists and connect high- gain antennas andincrease Tx power to increase cell size.
D. Deploy RAP where limited cable can be run or exists, and extend coverage using MAP.
Answer: D
Q13. An engineer is performing a predictive wireless design for a Parts Distribution Center, which requires data and location services. Which three requirements are inputs to the design? (Choose three.)
A. access points with directional antennas
B. continuous -67 dBm coverage from one access point
C. overlapping -75 dBm coverage from three access points
D. overlapping -67 dBm coverage from two access points
E. access points in IPS mode
F. continuous -72 dBm coverage from one access point
G. access points in corners and along perimeters
Answer: B,C,G
Explanation: Reference: http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/WiFiLBS- DG/wifich5.html
Q14. Which two options describe best practices that must be completed after a wireless installation is finished?
(Choose two.)
A. Make sure that there are no spaces between the devices on the rack that the Wireless Lan Controller isinstalled.
B. Consult with the customer to ensure that the IT staff has a complete set of design and installationdocuments.
C. Make sure the customer is aware that they should consider purchasing a support contract immediately afterthe installation is complete.
D. Spend time with the customer to show them the controller GUI and inform them how they can reach theCisco TAC if they have any problems.
E. Test all the customer’s wireless devices and applications to ensure they are working properly.
Answer: B,E
Q15. A network engineer wants the DSCP marking to align with the 802.11e access category video. What will this marking be?
A. 34
B. AF31
C. 4
D. 5
Answer: A
Q16. Which three options are benefits of U-APSD? (Choose three.)
A. optimized power-save mode periods
B. increased call capacity
C. bandwidth reservation
D. synchronization of the transmission and reception of voice frames
E. efficient roaming
F. priority bandwidth and polling
Answer: A,B,D
Explanation:
Unscheduled automatic power-save delivery (U-APSD) is a feature that has two key benefits:
The primary benefit of U-APSD is that it allows the voice client to synchronize the transmission and reception of voice frames with the AP, thereby allowing the client to go into power-save mode between the transmission/reception of each voice frame tuple. The WLAN client frame transmission in the access categories supporting U-APSD triggers the AP to send any data frames queued for that WLAN client in that AC. A U-APSD client remains listening to the AP until it receives a frame from the AP with an end-of-service period (EOSP) bit set. This tells the client that it can now go back into its power-save mode. This triggering mechanism is considered a more efficient use of client power than the regular listening for beacons method, at a period controlled by the delivery traffic indication map (DTIM) interval, because the latency and jitter requirements of voice are such that a WVoIP client would either not be in power-save mode during a call, resulting in reduced talk times, or would use a short DTIM interval, resulting in reduced standby times. The use of U-APSD allows the use of long DTIM intervals to maximize standby time without sacrificing call quality. The U-APSD feature can be applied individually across access categories, allowing U-APSD can be applied to the voice ACs in the AP, but the other ACs still use the standard power save feature.
The secondary benefit of this feature is increased call capacity. The coupling of transmission buffered data frames from the AP with the triggering data frame from the WLAN client allows the frames from the AP to be sent without the accompanying interframe spacing and random backoff, thereby reducing the contention experience by call.
Reference:
http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/vowlan/41dg/vowlan41dg-book/vowlan_ch2.html#wp1045982
Q17. A network engineer is configuring QoS with a DSCP value of 46. To which queue must the CoS be mapped for priority queuing of the voice frames?
A. 1
B. 2
C. 5
D. 4
E. 3
Answer: C
Q18. An engineer receives a digital image scanned from the floor plans of a facility to be surveyed for wireless survey and imported it into Air Magnet Pro. However, the document contains no scale. Which action can the engineer take to most accurately calibrate the size of the floor plan in Air Magnet?
A. Mark the length of a hallway, then count the ceiling tiles, multiply that number by 2 and enter that value.
B. Zoom in and mark across a hallway, then count the floor tiles across that hallway and enter that value.
C. Zoom in and mark a doorway, then size it at 3 feet because most doorways are 36 inches.
D. Mark the entire longest dimension of the floorplan, then use Google Earth to measure the correspondingoutside dimension and enter that value.
Answer: D