java barcode api free What kind of APs are used on centralized WLANs A Lightweight B Thick C Fat D Autonomous in Software

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7 What kind of APs are used on centralized WLANs A Lightweight B Thick C Fat D Autonomous
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A is correct Lightweight APs are used in centralized WLANs Access ports may also be used B, C, and D are incorrect These APs are used in distributed WLANs
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8 What functions are performed by the APs in most SCA implementations A Simple radio functions B The entire 80211 MAC layer functions C 75 to 80 percent of the 80211 MAC layer functions D Only Network layer functions
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A is correct Most SCA implementations use the APs as simple radios and antennas B, C, and D are incorrect SCA implementations perform the MAC-layer and upper-layer functions (including the Network layer) at the WLAN controller or switch
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9 How many non-overlapping channels exist in the 24 GHz spectrum used by 80211 A 1 B 3 C 5 D 56
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B is correct The 24 GHz ISM band provides three non-overlapping channels A, C, and D are incorrect These answers are simply incorrect
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10 Why can you place more 80211a APs than 80211g APs in the same area without causing co-channel interference A Because 80211g APs provide more non-overlapping channels B Because 80211g APs provide shorter communication time slices C Because 80211a APs provide shorter communication time slices D Because 80211a APs provide more non-overlapping channels
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D is correct 80211a APs do provide far more non-overlapping channels than 80211g APs A, B, and C are incorrect 80211g APs provide fewer non-overlapping channels than 80211a APs There is no such concept as communication time slices in 80211 networks
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11 Why do MCA implementations use hexagons to represent the coverage patterns of AP and antenna pairs A Because AP/antenna pairs create coverage cells in exact hexagonal patterns B Because they work well for representation in diagrams C Because the engineer enabled the Use Hex-Radiation setting in the APs D Because SCA radiates in a star pattern
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B is correct Hexagons should not be taken literally They simply look good in reports A, C, and D are incorrect APs do not create cells in hexagonal patterns in any environment There is no such setting as Use Hex-Radiation in any AP SCA does not radiate in a star pattern, but SCA radiates in patterns identical to MCA SCA is simply managed differently
12 In addition to spacing AP and antenna pairs sufficiently apart, what can you adjust to fine-tune an MCA implementation A WPA settings B Fragmentation threshold C Output power D Antenna gain
C is correct Fine-tuning of a WLAN cell can be achieved by adjusting the output power settings A, B, and D are incorrect WPA settings impact security and not coverage The fragmentation threshold determines when frames should be fragmented and does not impact coverage Antenna gain cannot be adjusted ; it can only be changed by replacing the antenna
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13 In a mesh wireless access layer, with what devices do the APs communicate using the wireless medium A Other APs only B Clients only C Other APs and clients D Neither APs nor clients
C is correct Mesh access layers use the wireless medium for communications with both the clients and the other APs A, B, and D are incorrect These answers are simply incorrect
14 What scenario may result in the inability of mesh wireless access layers to service real-time applications such as voice and media streaming A The existence of multiple mesh hops B The implementation of SCA C The implementation of MCA D The existence of a single mesh hop
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A is correct When multiple wireless mesh hops exist between the client and the network infrastructure, the delay may be too great for real-time applications B, C, and D are incorrect SCA and MCA are not mesh solutions The existence of a single mesh hop is usually acceptable for real-time communications
15 What is a primary feature of mesh wireless access layers that is not included in most MCA solutions A Redundancy B 80211 protocols C Wired backhaul D High-gain antennas
A is correct Redundancy is a primary benefit of most wireless mesh access layers B, C, and D are incorrect MCA solutions do use the 80211 protocol, implement a wired backhaul, and support high-gain antennas
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