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






2. 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






3. 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.






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






5. 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.






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






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






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






10. 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.






11. 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.






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






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






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






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






16. 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






17. 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.






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






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






20. 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.






21. 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.






22. A. CSMA/CA






23. 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)






24. 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






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






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






27. 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






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






29. 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.






30. 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.






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






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






33. An access point that provides routing functions.






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






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






36. 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.






37. In _____ - a transmitter concentrates the signal energy at a single frequency or in a very small range of frequencies.






38. 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






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






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






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 ______ ______ 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.






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






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






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






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






47. A type of WLAN in which stations communicate with an access point and not directly with each other.






48. 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.






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






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