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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. CSMA/CA






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






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






4. 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.






5. 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.






6. 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.






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






8. 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.






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






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






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






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






13. 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.






14. 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.






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






16. 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






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






18. 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






19. 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






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






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






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






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






24. 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






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






26. 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






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






28. 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.






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






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






31. 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.






32. An access point that provides routing functions.






33. 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.






34. 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






35. 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.






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






37. 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






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






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






40. 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.






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






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






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






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






45. 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.






46. 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.






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






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






49. 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.






50. 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.