Cisco IUWNE 1.0: Wireless Antennae and Spread Spectrum Technologies

This course is included in our On-demand training solution.


The technology behind sending wireless signals includes antennae, which are needed to transmit RF signals, and spread spectrum technologies, which include the protocols involved in sending wireless frames. This course describes the different types of antennae used in wireless implementations. It outlines the principles behind antenna technology, and discusses how to chose the right antenna based on where and how you want the signal to be received. This course also explains spread spectrum technologies, including Direct Sequence Spread Spectrum (DSSS) and orthogonal frequency-division multiplexing (OFDM), as well as the various modulation types used with each. In addition, the issues linked to channel overlaps and channel reuse are explored.
This course maps to the 640-721, Implementing Cisco Unified Wireless Networking Essentials (IUWNE), exam objectives for describing the basics of spread spectrum technology including modulation, DSSS, OFDM, channels reuse and overlap, and describing WLAN RF principles including antenna types and RF gain and loss.

Target Audience

Network associates, WLAN designers, planners, implementers, optimizers, trainers, or support personnel; candidates for the Implementing Cisco Unified Wireless Networking Essentials v1.0 640-721 examination, seeking to attain Cisco’s CCNA-WIRELESS credentials.


Certification in Interconnecting Cisco Networking Devices Part 1 (ICND1/CCENT); knowledge and skills commensurate with Interconnecting Cisco Networking Devices Part 2 (ICND2); a working knowledge of the Windows operating system and Cisco IOS networking and concepts

Expected Duration

90 min.

Course Objectives

Antennae Principles

  • recognize key principles of wireless signal radiation
  • Omnidirectional and Directional Antennae

  • recognize the coverage patterns and placement considerations associated with four categories of omnidirectional antennae
  • recognize the coverage patterns and placement considerations associated with three categories of directional antennae
  • Antennae Accessories

  • recognize the impact of antenna accessories on signal patterns and strength
  • Choosing and Placing the Wireless Antenna

    Resisting Interference Using FHSS and DSSS

  • recognize how spread spectrum technologies offer resistance to narrowband interference
  • Direct Sequence Spread Spectrum (DSSS) Modulations

  • recognize how DBPSK, DQPSK, and CCK are used to achieve higher signal speeds in Direct Sequence Spread Spectrum (DSSS) technology
  • Orthogonal Frequency-Division Multiplexing (OFDM)

  • recognize the capabilities and coding techniques for three OFDM modulations: BPSK, QPSK, and QAM
  • Channels and Overlapping Issues

  • recognize the implications of potential overlap between spread spectrum channels