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Flashcards

CWNA - Flash Cards - Chapter 5

Amit Pindoria CWNA Inglês 48 flashcards

Flashcards do conjunto (48)

  1. 13 Phyiscal (PHY) layer specfications for 802.111) Infrared
    2) FHSS
    3) DSSS
  2. 2802.11 radios PHY that can transmit in channels subdivided from the entire 2.4 GHzDSSS
  3. 3Radios, which are permitted to transmit on 1 MHz subcarriers in the 2.4FHSS
  4. 41 Mbps and 2 Mbps data rates were part of the ______ 802.11 standardOriginal
  5. 5802.11b is also known asHigh-Rate DSSS (HR-DSSS)
  6. 6Uses CCK (Complementary Code Keying)802.11b
  7. 7Data rates of 1, 2, 5.5, and 11 Mbps802.11 - 1, 2 Mbps
    HR-DSSS: 802.11b - 5.5, 11Mbps
  8. 8Uses 3 different 100 MHz unlicensed frequency5Ghz
  9. 9Data rates of 6, 9, 12, 18, 24, 36, 48, and 54 Mbps5Ghz (OFDM)
  10. 10Technology called Extended Rate Physical (ERP)802.11g
  11. 11Two mandatory PHYs are: ERP-OFDM and ERP-DSSS/CCK802.11g
  12. 12Two optional PHYs are: ERP-PBCC and DSSS-OFDM802.11g
  13. 13Country code information is delivered in beacons and probe responses802.11d
  14. 14Defines mechanisms for dynamic frequency selection (DFS) and transmit power control (TPC)802.11h
  15. 155.150 GHz–5.250 GHzU-NII-1 (lower)
    4 channels
  16. 165.250 GHz–5.350 GHzU-NII-2 (middle)
    4 channels
  17. 175.47 GHz–5.725 GHzU-NII-2 Extended
    802.11h 11 channels
  18. 185.725 GHz–5.825 GHzU-NII-3 (upper)
    4 channels
  19. 19Major security enhancements in Wireless Standard802.11i
  20. 20Data privacy using RC-4 ciphersTKIP
  21. 21Data privacy using AES encryptionCCMP
    (Cipher Block Chaining Message Authentication Code Protocol)
  22. 22Defines the entire method for authentication, generating encryption keys for clients and APsRobust Security Network (RSN)
  23. 23Japanese 4.9 GHz and 5 GHz bands802.11j
  24. 24Wireless Standard for QoS802.11e
  25. 25Contention-based method determining who gets to transmit on the wireless medium nextDistributed Coordination Function (DCF)
  26. 26Access point briefly takes control of the medium and polls the clientsPoint Coordination Function (PCF)
  27. 27Has 2 access mechanisms to provide QoSHybrid Coordination Function (HCF)
  28. 28- extension to DCF - provide for the “prioritization of frames” based on upper-layer protocolsEnhanced Distributed Channel Access (EDCA)
  29. 29- Extension of PCF - Gives the access point the ability to provide for “prioritization of stations.” - Like PCF never adopted by WLAN vendorsHybrid Coordination Function Controlled Channel Access (HCCA)
  30. 30WMMWireless Multi Media
  31. 31Fast basic service set transition (FT)802.11r
  32. 32Radio Resource Management (RRM)802.11k
  33. 33802.11k: 802.11h defined this for 5GHz frequencyTransmit Power Control (TPC)
  34. 34802.11k: These client statistics are reported back to the AP for RRM- Signal-to-Noise (SNR)
    - Signal strength (RSSI)
    - Data rates
  35. 35Noise floor information and Channel load information is reported back to the access point802.11k - RRM
  36. 36Learn details about other access points that the client might want to roam to from the access point or the WLAN ControllerNeighbour reports
  37. 37Robust management frames Designed to prevent DOS attacks against management frames802.11w
  38. 38Broadcast and multicast frames are protected using the Broadcast/Multicast Integrity Protocol (BIP)802.11w
  39. 39Known as Wireless Access in Vehicular Environments (WAVE)802.11p
  40. 40Allows client stations to bypass the access point and communicate with direct frame exchanges802.11z
    Direct Link Setup (DLS)
  41. 41Wi-Fi Alliance’s Hotspot 2.0 specification and its Passpoint certification This standard and certification is designed to provide seamless roaming for wireless devices between your Wi-Fi network and other partner networks, similar to how cellular telephone networks provide roaming802.11u
  42. 42Provides for an exchange of information that can potentially ease the configuration of client stations wirelessly from a central point of management802.11v
    Defines Wireless Network Management (WNM)
  43. 43Standardizing mesh networking using the IEEE 802.11 MAC/PHY layers802.11s
  44. 44QoS enhancements to the 802.11 Media Access Control (MAC) for robust audio and video streaming for both consumer and enterprise applications802.11ae
  45. 45Very High Throughput (VHT) at 60Ghz at up to 7 Gbps802.11ad
  46. 46256-QAM modulation802.11ac
  47. 47Null data packet (NDP)Used in 802.11ac beamforming
  48. 48Use of wireless in the newly opened TV white space (TVWS) frequencies between 54 MHz and 790 MHz802.11af

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Descrição
CWNA FlashCards sobre CWNA - Flash Cards - Chapter 5, criado por Amit Pindoria em 23-02-2017.
Criado por
Amit Pindoria
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Tags
cwna
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