CWNA®: Certified Wireless Network Administrator Official Study Guide

Chapter 6. Wireless Networks and Spread Spectrum Technologies

IN THIS CHAPTER, YOU WILL LEARN ABOUT THE FOLLOWING:

• Industrial, Scientific, and Medical bands (ISM)

  • 900 MHz ISM band

  • 2.4 GHz ISM band

  • 5.8 GHz ISM band

• Unlicensed National Information Infrastructure bands (UNII)

  • UNII-1 (lower band)

  • UNII-2 (middle band)

  • UNII-2 Extended

  • UNII-3 (upper band)

• Narrowband and spread spectrum

• Frequency hopping spread spectrum (FHSS)

  • Hopping sequence

  • Dwell time

  • Hop time

  • Modulation

• Direct sequence spread spectrum (DSSS)

  • DSSS data encoding

  • Modulation

• Packet Binary Convolutional Code (PBCC)

• Orthogonal Frequency Division Multiplexing (OFDM)

  • Convolutional coding

  • Modulation

• 2.4 GHz channels

• 5 GHz channels

• Adjacent, nonadjacent, and overlapping channels

• Throughput vs. bandwidth

• Communication ...