CCNP Wireless FAQ: Wireless Fundamentals
Q1. How does the wavelength of a wireless signal change as the frequency of the signal increases?
Q2. When a 2.4-GHz signal encounters an obstruction, what happens?
Q3. Does ionospheric reflection occur at microwave frequencies?
Figure: Microwave Signal Reflection
Answer: Ionospheric reflection generally does not occur at microwave frequencies.
Q4. How is wireless power measured?
Q5. In the abbreviation dBm, what does the “m” stand for?
Q6. If 1Watt equals +30 dBm, then 2W equals how many dBm?
Q7. The main lobe of a non-isotropic antenna radiates power in which direction?
A. In one horizontal direction
B. In two horizontal directions
C. Equally in all horizontal directions
D. Both A and C
Q8. If you can stand at one antenna and see the antenna at the other end of a wireless link, do you have a line-of-sight wireless path?
Q9. Tripling the distance on an unobstructed wireless link requires increasing the power how many times?