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46.
NicoCo is building a new facility and would like to install a WLAN for primary connectivity
of all clients. The requirements are dual - spectrum 802.11n supporting voice and location
tracking. What type of pre-deployment survey should be performed?
- A.Passive, using optimized channels
- B.Active, using a voice handset
- C.Active, using a lowest common denominator client/li>
- D.Predictive
- E.Passive, all channels
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| If the building hasn’ t been built, then unfortunately an active or passive survey cannot be performed. However, since the requirements are so great and the WLAN will be used for primary network connectivity and voice, a full active survey should be performed once the facility is built and populated with all furniture and other items that can affect RF characteristics. |
47.
You are being asked to perform a survey in a multifloor building. The building has
very thick walls that you know are going to highly attenuate signal propagation. When
performing some analysis onsite you notice fairly strong propagation between floors.
What two factors should you be very aware of? (Choose all that apply.)
- A.Channel planning
- B.Transmit power
- C.Hidden node/li>
- D.Multi - path
- E.Stacking APs
- Answer & Explanation
- Report
Answer : [A, E]
Explanation :
Explanation :
| Every building and construction method will affect RF propagation differently. It is important to consider three dimensions when planning channels and co - channel interference introduced by stacking APs on top of each other between fl oors. Staggering, rather than stacking, APs can sometimes provide better long - term coverage at RF cell overlap zones as changes to a facility alter RF coverage patterns, causing weaker overlapping signals at cell edges. |
48.
Assume Inc. is doing a point - to - point (PTP) network installation and has asked you to be
onsite to consult for the alignment and tuning effort. The equipment has been installed
and powered, but no link is being made. You can see that the antennas are a short distance
away and RF line of sight should not be an issue. What is the first question you should ask?
- A.Is your antenna polarization aligned?
- B.Did you test configurations before installing?
- C.What is the transmit power at each end?
- D.What are the channel settings?
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| Installing PTP links require attention to detail in the preparation and testing before actual installation. When on a radio tower or 10+ story rooftop building, all testing needs to be performed prior to installation, such as using multiple power cycles to ensure confi guration settings have been properly saved. |
49.
You are being asked to design a solution for a long - range PTP link using 5.8 GHz. While
the distance is well within the link budget, the other end of the links will be difficult to
see for alignment. What initial consideration could you factor into your design to ease the
alignment process?
- A.Additional antenna gain
- B.Receive sensitivity adjustment
- C.Lower antenna gain
- D.Antenna polarization
- E.Frequency choice
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| When installing long - range PTP links, antenna gain that ’ s too high will get you into trouble when you attempt to align the antennas. At least one end of a PTP link should have a lower antenna gain in order to aide in the antenna alignment process. Once proper alignment is achieved during the coarse tuning effort, high - gain antennas can replace the lower - gain antennas after the fi nal pointing direction is determined. |
50.
Four buildings are located in a square orientation to each other. Fisch Stix Food Company
is requesting a PtMP link between the buildings. On the building with the root bridge link,
what type of antenna is the best choice?
- A.Vertically polarized omni
- B.60 ˚ yagi
- C.Parabolic dish
- D.100 ˚ sector
- E.1Horizontally polarized omni
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| If all four buildings are in a perfect square orientation to each other, that means they are an angle of 90 ˚ apart. Installing a 100 ˚ sector antenna on the root node building will provide enough azimuth to reach all three other buildings while rejecting other RF interference in the areas where no buildings are present. Using a sector antenna also minimizes elevation antenna gain (again, where no other building PtMP antennas will be installed). |
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