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Q21. An 802.11n implementation is being discussed. Users are satisfied with the potential 300- 450 Mbps throughput of new 802.11n APs. Which three bandwidth requirements are used to calculate per client bandwidth through an 802.11n AP network? (Choose three.)
A. 450 Mbps throughput is the client max for 5-GHz radio.
B. Channel bonding on 5 GHz is required for a client to have a 300 Mbps WiFi link.
C. 300 Mbps throughput is the client max for 2.4-GHz radio.
D. The remaining bandwidth is divided per device when more clients are connected to one AP.
E. 100 Mbps Ethernet switch port is a potential bottleneck.
F. CleanAir helps clear noise for 802.11n channel bonding to work.
Answer: A,C,D
Q22. An engineer is assigned to assist a customer by estimating the number of access points needed to provide voice-grade wireless coverage in a carpeted office space. How many access points should be estimated to cover this space of roughly 38,000 square feet?
A. 17
B. 10
C. 6
D. 13
Answer: D
Explanation:
The rule of thumb coverage plan is 1 AP per 5,000 square feet for data and 1 per 3,000 square feet for voice and location services.
Reference: http://www.cisco.com/c/en/us/td/docs/wireless/technology/apdeploy/8-0/Cisco_Aironet_3700AP.html
Q23. Cisco 7925G phones are experiencing intermittent connectivity issues. The wireless survey reveals that the facility has no current coverage holes. The radios on the 2.4GHz channel have all been statically set to power level 1. Which two reasons could explain why the phones are having issues on this wireless network? (Choose two.)
A. The phones are experiencing excessive co-channel interference.
B. The phones only operate on the 2.4 GHz band when the power level is above 25 mW.
C. The phones are not transmitting at the same power levels as the access points.
D. The phones are experiencing delays of less than 30 ms within their coverage cell.
E. The phones are receiving greater than -67 dBm RSSI on the 2.4 GHz band.
Answer: A,C
Q24. 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
Q25. 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
Q26. Which two factors influence the density of APs in a data-only WLAN environment? (Choose two.)
A. the number of clients that will roam through the facility
B. the type of controller chosen
C. the defined coverage area and customer needs
D. the number of APs dedicated to voice services
E. channel reuse and WLAN bandwidth
Answer: A,E
Q27. An engineer is performing a predictive wireless design for a carpeted office space, which requires voice capability and location services. Which two requirements are inputs to the design? (Choose two.)
A. overlapping -67 dBm coverage from three access points
B. overlapping -75 dBm coverage from three access points
C. overlapping-72 dBm coverage from two access points
D. continuous -67 dBm coverage from one access point
E. continuous -72 dBm coverage from one access point
Answer: B,D
Explanation:
http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/emob73dg/emob73/ch3_WLAN.html#pgfId-1000250
Q28. A customer is deploying a Greenfield 802.11ac network on a floor that will support approximately 300 wireless devices. Which setting needs to be changed on Prime Infrastructure Planning Tool in order to predict the amount of access points the customer needs to service the new floor?
A. Data Coverage Support Margin
B. Demand Settings
C. Add AP Field
D. 802.11n Protocol Support
Answer: B
Explanation: Reference: http://www.cisco.com/c/en/us/td/docs/wireless/prime_infrastructure/1-2/configuration/guide/pi_12_cg/maps.html#pgfId-1671104
Q29. A hospital environment was designed to guarantee RF coverage at or better than -67 dBm in the 5 GHz spectrum. The customer mandates that RRM be used for DCA and TPC in both bands. After deployment, why do many of the legacy 802.11b/g devices have difficulty maintaining connectivity?
A. Excessive co-channel interference in the 2.4 GHz band exists.
B. Excessive overlapping channels in the 2.4 GHz band exists.
C. TPC drastically reduces Tx power in the 2.4 GHz band.
D. TCP drastically increases Tx power in the 2.4 GHz band.
Answer: C
Q30. Which list of characteristics must all controllers in a mobility group have in common based on best practices?
A. mobility group name, version of controller code, Control and Provisioning of Wireless Access Points mode,ACLs, and WLANs (SSIDs)
B. mobility domain name, version of controller code, and Control and Provisioning of Wireless Access Pointsmode
C. mobility domain name, version of controller code, Control and Provisioning of Wireless Access Pointsmode, ACLs, and WLANs (SSIDs)
D. mobility group name, version of controller code, and Control and Provisioning of Wireless Access Pointsmode
Answer: A
