CCNA_Wireless.txt

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Anonymous
ID:
74010
Filename:
CCNA_Wireless.txt
Updated:
2011-03-20 13:27:41
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CCNA
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Memory facts
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  1. USA frequency range for 2.4 GHz - ISM
    2.0 - 2.4835
  2. UNII-1 range
    5.15-5.25 GHz
  3. UNII-2 range
    5.25-5.35 GHz
  4. UNII-2 extended range
    5.47-5.7253 GHz
  5. ISM
    5.725-5.850 GHz
  6. ELF Range
    • 3 Hz
    • 30 Hz
  7. SLF Range
    • 30 Hz
    • 300 Hz
  8. ULF Range
    • 300 Hz
    • 3kHz Hz
  9. VLF Range
    • 3 kHz
    • 30 kHz
  10. LF Range
    • 30 kHz
    • 300 kHz
  11. MF Range
    • 300 kHz
    • 3 MHz
  12. HF Range
    • 3 MHz
    • 30 MHz
  13. VHF Range
    • 30 MHz
    • 300 MHz
  14. UHF Range
    • 300 MHz
    • 3 GHz
  15. SHF Range
    • 3 GHz
    • 30 GHz
  16. EHF Range
    • 30 GHz
    • 300 GHz
  17. CB Radio
    26.965-27.405 MHz (HF)
  18. FM Radio
    88.1 - 108.1 MHz (VHF)
  19. 802.11b/g Freq. range
    2.4000 - 2.3835 GHz (UHF)
  20. 802.11a Freq. range
    5.47 - 5.725 GHz (SHF)
  21. 1 Mb Data Rate encoding method
    11 chip Barker coding
  22. 2 Mb Data Rate encoding method
    11 chip Barker coding
  23. 5.5 Mb Data Rate encoding method
    8 chip encoding - 8 bits CCK coding
  24. 11 Mb Data Rate encoding method
    8 chip encoding - 4 bits CCK coding
  25. 1 Mb Data Rate modulation method
    DSSS BPSK
  26. 2 Mb Data Rate modulation method
    DSSS QPSK
  27. 5.5 Mb Data Rate modulation method
    DSSS QPSK
  28. 11 Mb Data Rate modulation method
    DSSS QPSK
  29. FCC antenna TX power maximum P2P
    30 dBm
  30. FCC antenna maximum gain P2P
    6 dBm
  31. FCC antenna EIRP maximum P2P
    36 dBm
  32. CISCO antenna TX power maximum P2P
    20 dBm
  33. CISCO antenna maximum gain P2P
    36 dBm
  34. CISCO antenna EIRP maximum P2P
    56 dBm
  35. FCC antenna TX power maximum P2MP
    30 dBm
  36. FCC antenna maximum gain P2MP
    6 dBm
  37. FCC antenna EIRP maximum P2MP
    36 dBm
  38. CISCO antenna TX power maximum P2MP
    20 dBm
  39. CISCO antenna maximum gain P2MP
    36 dBm
  40. CISCO antenna EIRP maximum P2MP
    36 dBm
  41. EUROPE and other TX max
    17 dBm
  42. EUROPE and other max gain
    3 dBi
  43. EUROPE and other EIRP max
    20 dBm
  44. CISCO comp to EUROPE and other TX max
    17 dBm
  45. CISCO comp to EUROPE and other max gain
    2.2 dBi
  46. CISCO comp to EUROPE and other EIRP max
    19.2 dBm
  47. An independent U.S. government agency established by the Communications Act of 1934. It regulates communications
    FCC
  48. A nonprofit organization/professional association for the advancement of technology
    IEEE
  49. Produces globally applicable standards for Information and Communications Technologies (ICT)
    ETSI
  50. The frequency spectrum, measured in Hertz. Bandwidth can refer to data rates or the width of an RF channel
    bandwidth
  51. Used to measure bandwidth. Hertz measures the number of cycles per second. One Hertz is one cycle per second
    Hz
  52. Use of spread spectrum in the commercial market
    ISM frequency bands
  53. ISM
    Industry, Scientific, and Medical
  54. Frequency ranges used in wire- less networks that don�t require licensing.
    UNII
  55. UNII
    Unlicensed National Information Infrastructure
  56. The modulation technique used by 802.11b devices to send data. The transmitted signal is spread across the entire frequency spectrum that is being used
    DSSS
  57. DSSS
    Direct Sequence Spread Spectrum
  58. number of channels in a frequency range. Not considered a spread spectrum technology but is used for modulation in a wireless network
    OFDM
  59. OFDM
    Orthogonal Frequency Division Multiplexing
  60. The volume of the signal
    amplitude
  61. The pitch of the signal
    frequency
  62. The timing of the signal between peaks
    phase
  63. A code used to represent bits
    chipping code
  64. Defines the use of 11 chips when encoding data.
    barker code
  65. Uses a series of codes called complementary sequences
    CCK
  66. CCK
    Complementary Code Keying
  67. A modulation technique used in 802.11 networks.
    BPSK
  68. BPSK
    Binary Phase Shift Keying
  69. A version of frequency modulation in which the phase of the carrier wave is modulated to encode bits of digital information in each phase change
    QPSK
  70. QPSK
    Quadrature Phase Shift Keying
  71. A technology that is used in the new 802.11n specification. devices use multiple antennas to receive signals, usually two or three, as well as multiple antennas to send signals.
    MIMO
  72. MIMO
    Multiple-Input Multiple-Output
  73. The capability of a wireless network to shift to a lower rate as a client moves farther away from the AP
    DRS
  74. DRS
    Dynamic Rate Shifting
  75. When a device wants to send, it must listen first. Similar to CSMA/CD.
    CSMA/CA
  76. CSMA/CA
    Carrier Sense Multiple Access/Collision Avoidance
  77. A message indicating that it is clear to send data on the wireless medium.
    CTS
  78. CTS
    Clear-To-Send
  79. A request to send on a wireless network.
    RTS
  80. A nonprofit organization that certifies the interoperability of more than 4200 products.
    Wi-Fi Alliance
  81. RTS
    Request-To-Send
  82. Used to estimate the service area of a device.
    EIRP
  83. EIRP formula
    TXer – cable loss + antenna gain

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