As a consultant, you have been hired by ABC Company to implement an outdoor WLAN connection between two buildings that are 2 kilometers (1.24 miles) from each other, with no obstructions in between.
Your first required objective is to create a point-to-point link between the two buildings within the local regulatory body's 800 mW EIRP maximum.
Your second required objective is to provide an industry-standard security solution capable of supporting mutual authentication.
As an optional objective, you must minimize the amount of interference from, and to, nearby WLAN networks.
You install an OFDM wireless bridge at each building, configuring one in root mode and the other in non-root mode. You set each radio for 100 mW (20 dBm) and attach 9 dBi omnidirectional antennas to both. You configure the network for WPA2-Enterprise with PEAPv0/EAP-MSCHAPv2 authentication.
Which statement is true about the solution you chose to deploy?
A. Your solution meets bothrequired objectives and the optional objective.
B. Your solution meets the second required objective and the optional objective, but not the first required objective.
C. Your solution meets neither required objective but meets the optional objective.
D. Your solution meets both required objectives, but does not meet the optional objective.
During the discovery and connectivityprocess, client and AP stations exchange information about their supported data rates. After the association, how do client and AP stations select the supported data rate that will be used to send an 802.11 data frame?
A. During the association, the client and AP agree to use thesame transmit rate, but either station can request a change at any time after the association.
B. The client and AP each choose the optimal data rate to use independently of one another, based on their own measurements related tothe RF link.
C. The client and AP may use different transmit rates, but the AP determines the data rate that will be used by each client station in the BSS.
D. The client and AP may use different transmit rates, but the client determines the data rate thatit will use and the datarate that the AP will use when communicating to the client.
E. The client and AP may use a different transmit rates, but the transmit rate is determined by the peer station, based on the peer's experience of the RF link.
Which one of the following frequency ranges is not specified for use by IEEE 802.11 radios as of 802.112012?
A. 600-630 MHz
B. 2.4000-2.4835 MHz
C. 5.725-5.874 GHz
D. 5.15-5.25 GHz
The center frequency of channel 1 in the 2.4 GHz band is 2.412 GHz (2412 MHz).
What is the center frequency of channel 4?
A. 2.413 GHz
B. 2.417 GHz
C. 2.422 GHz
D. 2.427 GHz
E. 2.437 GHz
Why is it recommended for a wireless network administrator to disable 1 Mbps and 2 Mbps data rates on the WLANinfrastructure? (Choose 2)
A. To improve capacity in the BSS
B. To reduce the size of the AP's effective service area
C. Toprevent 802.11b devices from associating
D. To maximize the range of the highest data rates
E. To prevent VoWiFi multicast frames
F. To enable support for long preambles
The OSI model is a 7-layer model forunderstanding the functions of a communication system. What OSI sublayers are specifically addressed by the IEEE 802.11-2012 standard? (Choose 2)
A. Network
B. PPDU
C. PLCP
D. MAC
E. IP
F. Transport
What facts are true regarding controllers and APs in a Split MAC architecture? (Choose 2)
A. An IP tunnel is established between the AP and controller for AP management and control functions.
B. Using centralized data forwarding, APs never tag Ethernet frames with VLAN identifiers or 802.1p CoS.
C. With 802.1X/EAP security, the AP acts as the supplicant and the controller acts as the authenticator.
D. Management and data frame types must be processed locally by the AP, while control frame types must be sent to the controller.
E. In a distributed data forwarding model, the AP handles frame encryption and decryption.
What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) in IEEE
802.11 WLANs?
A. 802.11a and 11n use six (6) "pilot" subcarriers as a reference for thereceiver to detect frequency and phase shifts of the signal.
B. 802.11a/g/n OFDM includes several combinations of modulation and coding to achieve data rates from 1-600 Mbps.
C. With 802.11a OFDM, 16-QAM provides either 48 or 54 Mbps data rates, dependingupon coding rates.
D. 802.11ac VHT-OFDM utilizes 256-QAM, which increases the data rate significantlyover 64-QAM available in HT-OFDM.
E. In 802.11a OFDM, fifty-six (56) subcarriers are used as parallel symbol transmission paths to carry data.
The IEEE 802.11a/n/ac physical layer technologies utilize the 5 GHz frequency band. What is true ofthe channels in this frequency spectrum?
A. 14 channels are available worldwide.
B. 11 channels are available worldwide.
C. Regulatory domains worldwide require DFS and TPC in all these channels.
D. DFS may be required in some regulatory domains on somechannels.
E. 802.11 channels areseparated by 5 Mhz
A company has hired you to perform a pre-deployment site survey of their facility. During an interview, the network manager informs you thatthe new wireless network must use 5 GHz bands and OFDM, and VoWiFi handsets will be used extensively over the wireless network.
What items do you need to include in the RF site survey report? (Choose 2)
A. A heat map demonstrating signal quality in areaswhere VoWiFi is supported.
B. Codec types and sampling rates for each VoWiFi phone
C. Security parameters and configuration steps for VoWiFi handsets.
D. Test results from an active survey with a VoWiFi handset
E. Results of OFDM versus ERP performance ineach BSA
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