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






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






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






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






5. 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)






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






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






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






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






10. Omnidirectional






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






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






13. 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.






14. A. CSMA/CA






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






16. 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






17. 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






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






19. 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






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






21. 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.






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






23. An access point that provides routing functions.






24. 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






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






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






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






28. 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.






29. 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.






30. In the context of 802.11n wireless technology - the combination of two 20-MHz frequency band to create one 40-MHz frequency band that can carry more than twice the amount of data that a single 20-MHz band could. It's recommended for use only in the 5






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






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






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






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






35. 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






36. A group of access points and associated stations (or basic service sets) connected to the same LAN.






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






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






39. 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






40. 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.






41. 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.






42. 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.






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






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






45. In IEEE terminology - the identifier for a BSS (basic service set)






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






47. 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.






48. 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






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






50. The equipment on a satellite that receives an uplinked signal from Earth - amplifies the signal - modifies its frequency - then retransmits it (in a downlink) to an antenna on Earth.