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CCNP Wireless FAQ: Performing Site Surveys

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CCNP Wireless FAQ: Performing Site Surveys

Q1. A physical site survey includes determining how to route cable from the wireless equipment to the antenna. True or false?

Figure: Antenna-Mounting Location Examples

ccnp-wireless-faq-performing-site-surveys

Answer: True.

Q2. Before you perform a physical site survey, you should know how high above the ground your antennas need to be mounted. True or false?

Answer: True.

Q3. If there is already wireless equipment operating on a building, you will first discover it during your RF site survey. True or false?

Answer: False. If there is already wireless equipment operating, you should discover it by asking about it during your initial meeting with building management.

Q4. Minimizing the distance between your wireless equipment and your antenna system is important. Why?

Answer: Minimizing the distance between your equipment and the antenna system is important when using coax cable because the longer the coax, the higher the signal loss and the smaller the wireless coverage range.

Q5. If power lines run near a roof edge, is it okay to mount your antenna near that roof edge? Why or why not?

Answer: If power lines run near a roof edge, it is not okay to mount an antenna system nearby. Antenna systems must be mounted far enough away so that it is impossible for them to fall or be blown into contact with power lines.

Q6. What is the biggest consequence from installing a wireless system in an area with a high noise level?

Answer: The biggest consequence of installing a system in a high noise level area is a reduction in network throughput.

Q7. If you have a wireless protocol analyzer, you do not need a wireless spectrum analyzer. True or false?

Answer: False. A wireless protocol analyzer can supplement but not replace a spectrum analyzer. A spectrum analyzer is still needed to observe out-ofband and non-802.11b signals.

Q8. If the operation of license-free equipment causes interference to the operation of licensed amateur radio equipment, the operator of the license-free equipment is responsible for correcting the interference problem. True or false?

Answer: True.

Q9. The length of the spectrum analyzer sampling interval doesn’t tell you anything about the level of RF interference in a particular area. True or false?

Answer: False. The more quickly that interfering signals are picked up, the higher the level ofRFinterference in a particular area.

Q10. In general, the higher the signal-to-noise ratio on a wireless link, the higher the wireless throughput. True or false?

Answer: True.

Q11. What part of a point-to-multipoint wireless network is the most vulnerable to a high noise level? Why?

Answer: The hub site access point receiver of a point-to-multipoint network is the most vulnerable to a high noise level. Noise reduces the signal-tonoise ratio, which reduces the size of the coverage area and the throughput of the network.