Exam 14: Wireless Lans

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Another rule of thumb is that as the frequency increases,the easier it is to disrupt the signal.

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The two frequency bands typically used by IEEE 802.11 wireless networks are located approximately at 900 MHz and 2.4 GHz.

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IEEE 802.11 defines a number of services that need to be provided by wireless LAN to provide functionality.Which of the following is not one of these services?

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Wireless LAN applications typically employ control modules that link wireless LANs to wired LANs.

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__________ is the primary service used by stations to exchange MAC frames when the frame must traverse the DS to get from a station in one BSS to a station in another BSS.

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A basic service set (BSS)is:

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A wireless LAN is easier than wired LANs because there are fewer requirements for capacity and connectivity.

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_________ enables an established association to be transferred from one AP to another,allowing a mobile station to move from one BSS to another.

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Information that is delivered as a unit between MAC users.

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Typical ranges (distance between sender and receiver)for a wireless LAN are of the order 100 to 1000 meters.

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A __________ is any device that contains an IEEE 802.11 conformant MAC and physical layer.

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WLANs use one of three transmission techniques: spread spectrum, narrowband microwave,and __________.

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________ is a notification from either a station or an AP that an existing association is terminated.

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Before a station can transmit or receive frames on a WLAN,its identity and address must be known.For this purpose,a station must establish a(n)_________ with an AP within a particular BSS.

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When using wireless network,roaming occurs when a mobile stations moves from one access point (or cell)to another.

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A basic rule of thumb for radio-based communication is that the higher the frequency,the shorter the transmission distance.

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This is defined as a station movement from one BSS to another within the same ESS.In this case,delivery of data to the station requires that the addressing capability be able to recognize the new location of the station.

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When using a wireless LAN with a notebook computer,it is necessary for the computer not to move while the connection is active.

(True/False)
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The _________ service enables transfer of data between a station on an IEEE 802.11 LAN and a station on an integrated IEEE 802.x LAN.

(Short Answer)
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One advantage of wireless LAN use is that any transmission frequency can be used as long as it does not interfere with other nearby applications.

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