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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. 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.






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






3. 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






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






5. 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.






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






7. 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.






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






9. 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.






10. 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.






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






12. 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.






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






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






15. 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)






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






17. 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.






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






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






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






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






22. 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.






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






24. 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






25. An access point that provides routing functions.






26. 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






27. 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






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






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






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






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






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






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






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






35. Regulated radio frequency band - 1/3rd range of 802.11b or g - Usually found in corporate environments.






36. 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.






37. 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.






38. 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.






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






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






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






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






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






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






45. 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.






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






47. Omnidirectional






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






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






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