wireless networking

Card Set Information

Author:
cmob011
ID:
260385
Filename:
wireless networking
Updated:
2014-02-05 12:23:23
Tags:
4elect
Folders:
technology
Description:
wireless networking
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user cmob011 on FreezingBlue Flashcards. What would you like to do?


  1. Networks that trans-mit signals through the atmosphere via radio frequency (RF) waves
    wireless networks
  2. continuum of the electromagnetic waves used for data and voice communication.
    wireless spectrum
  3. collection of frequencies available for communication
    airwaves
  4. describes the relative strength over a three dimensional area of all the electromagnetic energy the antenna sends or receives.
    antenna’s radiation pattern
  5. issues wireless signals along a single direction
    directional antenna
  6. issues and receives wireless signals with
    equal strength and clarity in all directions
    omnidirectional antenna
  7. uses the leastamount of energy and results in the reception of the clearest possible signal
    LOS (line-of-sight)
  8. in wireless signaling is no different from reflection of other electromagnetic waves,such as light.
    Reflection
  9. a wireless signal splits into secondary waves when it encounters an obstruction.
    diffraction
  10. the diffusion, or the reflection in multiple different directions, of a signal. Scattering occurs when a wireless signal encounters an object that has small dimensions compared to the signal’s wavelength.
    Scattering
  11. multiple number of differentpaths to their destination
    multipath
  12. paths wireless signals take, they are bound to run into obstacles
    Signal Degradation
  13. a transmitter concentrates the signal energy at a singlefrequency or in a very small range of frequencies
    narrowband
  14. uses a relatively wide band of the wireless spectrum
    Broadband
  15. The use of multiple frequencies to transmit a signa
    spread-spectrum
  16. a signal jumps between several different frequencies within a band in a synchronization pattern known only to the channel’s receiver and transmitter.
    frequency hopping spread spectrum
  17. a signals bits are distributed over an entire frequency band at once.
    direct-sequence spread spectrum
  18. wireless communication falls into one of two categories:
    • fixed
    • mobile
  19. wireless systems, the locations of the transmitter and receiver do not move.
    fixed
  20. the receiver can be located anywhere within the
    transmitters range.
    mobile
  21. a device that accepts wireless signals from multiple nodes and retransmits them to the rest of the network
    access point (AP)
  22. task
    scanning
  23. In active scanning, the station transmits a special frame
    probe
  24. In passive scanning, a wireless station listens on all channels within its frequency range for aspecial signa
    beacon frame
  25. a unique character string used to identify an access point.
    service set identi-fier

What would you like to do?

Home > Flashcards > Print Preview