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






2. 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.






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






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






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






6. 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.






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






9. 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.






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






11. 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






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






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






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






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






16. 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.






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






18. 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.






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






20. 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






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






22. Omnidirectional






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






24. An access point that provides routing functions.






25. 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.






26. 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.






27. 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.






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






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






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






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






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






33. 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.






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






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






36. 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.






37. 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






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






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






40. 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






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






42. 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.






43. 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






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






45. A. CSMA/CA






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






47. 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






48. 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.






49. 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.






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