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Wireless Networking Vocab

Subject : it-skills
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. This is the diffusion - or the reflection in multiple different directions - of a signal. This occurs when a wireless signal encounters an object that has small dimensions compared to the signal's wavelength.






2. The geographical area in which signals issued from an antenna or wireless system can be consistently and accurately received.






3. An antenna's _______ _______ describes the relative strength over a three-dimensional area of all the electromagnetic energy the antenna sends or receives.






4. In ________________ - a signal jumps between several different frequencies within a band in a synchronization pattern known only to the channel's receiver and transmitter.






5. Networks that transmit signals through the atmosphere via radio frequency (RF) waves.






6. A type of satellite Internet access service in which a subscriber sends and receives data to and from the Internet over the satellite link. This is a symmetrical technology - in which both upstream and downstream throughputs are advertised to reach 4






7. A type of satellite that orbits the Earth with an altitude between 100 and 900 miles - closer to the Earth's poles than the orbits of either GEO or MEO satellites. LEO satellites cover a smaller geographical range than GEO satellites and require less






8. An ______ ______ issues and receives wireless signals with equal strength and clarity in all directions. This type of antenna is used when many different receivers must be able to pick up the signal - or when the receiver's location is highly mobile.






9. A method used by wireless stations to detect the presence of an access point. In _____ _____ - the station issues a probe to each channel in its frequency range and waits for the access point to respond.






10. The signals made of electromagnetic energy that travel through the atmosphere.






11. This type of propagation uses the least amount of energy and results in the reception of the clearest possible signal.






12. A destination node must issue an acknowledgment for every packet that is received intact.






13. The locations of the transmitter and receiver do not move. The transmitting antenna focuses its energy directly toward the receiving antenna. This results in a point to point link. (Advantage: receiver's location is predictable - energy need not be w






14. The term used to describe the recently released standards for high thoughput - long-distance digital data exchange over wireless connections. WiMAX (IEEE 802.16) is one example of a wireless broadband technology.






15. A wireless networking standard that uses FHSS signaling in the 2.4GHz band to achieve a maximum throughput of either 723 Kbps or 2.1 Mbps - depending on the version. Bluetooth was designed for use primarily with small office or home networks in which






16. Which techniques help to reduce overhead in 802.11n wireless transmission?






17. In 802.11 wireless networking - a type of frame issued by a station during active scanning to find nearby access points.






18. In the context of wireless networking - the process in which a station listens to several channels within a frequency range for a beacon issued by an access point.






19. A command-line utility for viewing and setting wireless interface parameters on Linux and UNIX workstations.






20. In the context of wireless networking - a frame issued by an access point to alert other nodes of its existence.






21. The range of radio frequencies from 2.4 to 2.4835 GHz. This band allows for 11 unlicensed channels - and is used by WLANs that follow the popular 802.11b and 802.11g standards.






22. Because of reflection - diffraction - and scattering - wireless signals follow a number of different paths to their destination.






23. A consortium of companies - including Sony Ericsson - Intel - Nokia - Toshiba - and IBM - that formally banded together in 1998 to refine and standardize Bluetooth technology.






24. A device used on wireless LANs that transmits and receives wireless signals to and from multiple nodes and retransmits them to the rest of the network segment. Access points can connect a group of nodes with a network or two networks with each other.






25. An exchange in which a wireless station requests the exclusive right to communicate with an access point and the access point confirms that it has granted that request.






26. A small (usually home) network composed of personal communications devices.






27. In the context of wireless networking - the process of a station establishing a connection (or associating) with a different access point.






28. The process a wireless station undergoes to find an access point.






29. A. CSMA/CA






30. A unique character string used to identify an access point on an 802.11 network.






31. A network access method used on 802.11 wireless networks. In CSMA/CA - before a node begins to send data it checks the medium. If it detects no transmission activity - it waits a brief - random amount of time - and then sends its transmission. If the






32. A continuum of the electromagnetic waves used for data and voice communication. The _______ _______ (as defined by the FCC - which controls its use) spans frequencies between 9KHz and 300 GHz. each type of wireless service can be associated with one






33. In ________ wireless - the receiver can be located anywhere within the transmitter's range. This allows the receiver to roam from one place to another while continuing to pick up its signal.






34. In the context of wireless - the phenomenon that occurs when an electromagnetic wave encounters an obstacle and bounces back toward its source. A wireless signal will bounce off objects whose dimensions are large compared to the signal's average wave






35. The use of multiple frequencies to transmit a signal. (because the signal is spread out over the wireless spectrum)






36. Used by newer types of WLANs. A range of frequencies that comprises four frequency bands: 5.1 - 5.3 - 5.4 - and 5.8GHz. It consists of 24 unlicensed bands - each 20 MHz wide. This band is used by WLANs that follow the 802.11a and 802.11n standards.






37. An area covered by a wireless access point that provides visitors with wireless services - including Internet access.






38. In the context of 802.11n wireless networking - the ability for access points to issue multiple signals to stations - thereby multiplying the signal's strength and increasing their range and data-carrying capacity. Because the signals follow multipat






39. A special identifier shared by BSSs that belong to the same ESS.






40. An access point that provides routing functions.






41. The relative strength over a three dimensional area of all the electromagnetic energy an antenna sends or receives.






42. Omnidirectional






43. A method of satellite Internet access in which a subscriber receives data via a satellite downlink transmission - but sends data to the satellite via an analog modem (dial-up) connections.






44. A type of wireless LAN in which stations communicate directly with each other (rather than using an access point)






45. The term used to refer to a satellite that maintains a constant distance from a point on the equator at every point in its orbit. Geosynchronous orbit satellites are the type used to provide satellite Internet access.






46. An access point that provides routing functions and is used as a gateway.






47. A change in a wireless signal's strength as a result of some of the electromagnetic energy being scattered - reflected - or diffracted after being issued by the transmitter.






48. Which type of satellites is used to provide satellite Internet access?






49. A connection from an orbiting satellite to an Earth -based receiver.






50. In the context of wireless networking - an assessment of client requirements - facility characteristics - and coverage areas to determine an access point arrangement that will ensure reliable wireless connectivity within a given area.