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






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






3. 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






4. 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






5. 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






6. 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.






7. 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.






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






9. 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.






10. 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






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






12. 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.






13. 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






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






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






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






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






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






19. 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)






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






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






22. 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.






23. 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.






24. 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.






25. 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.






26. 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.






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






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






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






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






31. 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.






32. A. CSMA/CA






33. 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






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






35. 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.






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






37. 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.






38. 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.






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






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






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






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






43. 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.






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






45. Omnidirectional






46. 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.






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






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






49. An access point that provides routing functions.






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







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