Test your basic knowledge |

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. Why are the 802.11b and 802.11g wireless transmission technologies more commonly used on business LANs than Bluetooth?






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






4. If your wireless stations are configured to perform passive scanning - what do they need from an access point to initiate association?






5. 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.






6. A type of satellite that orbits the Earth roughly 6000 to 12 -000 miles above its service - positioned between the equator and the poles. MEO satellites can cover a larger area of the Earth's surface than LEO satellites while using less power and cau






7. 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






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






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






10. In wireless networking - the process that describes a station moving between BSSs without losing connectivity.






11. 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.






12. When a wireless signal splits into secondary waves as it encounters an obstruction. The secondary waves continue to propagate in the direction in which they were split. (bending around an obstacle)






13. 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






14. 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.






15. 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






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






17. An access point that provides routing functions.






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






19. In the context of wireless networking - the communication that occurs between a station and an access point to enable the station to connect to the network via that access point.






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






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






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






23. ISM Range - Radio frequency band that may experience home appliance interference - Unregulated radio frequency band.






24. What frequency band is used by Bluetooth - 802.11b - and 802.11g?






25. 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.






26. 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






27. 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






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






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






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






31. Another type of Spread-Spectrum signaling. In __________ - a signal's bits are distributed over an entire frequency band at once. Each bit is coded so that the receiver can reassemble the original signal upon receiving the bits.






32. An end node on a network; used most often in the context of wireless networks.






33. 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






34. 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.






35. A. CSMA/CA






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






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






39. A ______ ______ issues wireless signals along a single direction. This type of antenna is used when the source needs to communicate with one destination - as in a point to point link.






40. On your Linux workstation - you open a terminal window and type at the command prompt iwconfig eth0 key 5c00951b22. What have you done?






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






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






43. 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.






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






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






46. Omnidirectional






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






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






49. 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.






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