Which of the following items is NOT necessary to document as part of a long-distance RF path survey?
Answer(s): E
There are many outdoor interference sources, and some can change just by their nature.Seek out and record the effects of the following:1. Trees, buildings, lakes, or other obstructions or reflective objects2. Trees without leaves that will later have leaves or that will grow to interfere with the Fresnel zone.3. Automobile traffic - if linking two buildings at first-story height across a road, a large truck or bus could disable the link.Record the interference source, its location, and its effect and potential effect on wireless LAN coverage, range, and throughput. This data should be recorded both on your copy of the blueprint as well as in a separate list for easy future reference. Taking pictures of interference sources that are permanent (e.g., lakes and buildings) will serve as a visual reference to the client.
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?
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
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