While performing an RF site survey for an 802.11b Wireless LAN, what minimum bandwidth setting should you use?
Answer(s): D
If you are using an 802.11b wireless LAN, for example, record where the data rate decreases from 11Mbps to 5.5Mbps to 2Mbps to 1Mbps, as shown in Figure 11.16. These boundaries should somewhat resemble concentric circles, with the slower data rate areas further from the access point than the higher data rates. The client organization must be told that when a user roams out past the coffee machine to the mailroom, that user will not get the highest possible throughput due to the data rate decrease, which, in turn, is due to the distance increase.
What is the name for a group of wireless stations communicating without the use of an access point?
Answer(s): E
When comparing omni-directional antennas with antennas that focus the signal into a narrow beam, which of the following attributes is higher for narrow beam antennas?
Answer(s): C
You are administering a network with wireless LAN components for .com. The wireless portion of the network is configured using statically assigned WEP keys stored on each station's wireless PC Card. It has been reported to you that one of the wireless client computers containing a wireless PC Card has been stolen. What reasonable actions could be taken to restore the wireless LAN to the former level of security? Select two.
Answer(s): B,D
Before going into a low-power state (sleep), what function must a wireless station operating in a BSS perform?
Answer(s): A
When using PSP mode in a BSS, stations first send a frame to the access point to inform theaccess point that they are going to sleep, (temporarily powering down). The access pointthen records the sleeping stations as asleep. The access point buffers any frames that are intended for the sleeping stations. Traffic for those clients who are asleep continues arriving at the access point, but the access point cannot send traffic to a sleeping client. Therefore, packets get queued in a buffer marked for the sleeping client.
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