Question 2
Which governing body analyzes the applications and environments in which wireless networks are used?
A. EIRP
B. ETSI
C. FCC
D. IEEE
E. WiFi Alliance
Answer: D
Question 3
What does the current European Telecommunications Standards Institute rule state is the 2.4-GHz maximum transmitter output power for point-to-point installations?
A. 16dBm
B. 17dBm
C. 20dBm
D. 30dBm
E. 36dBm
Answer: B
Explanation
Currently ETSI stipulates a maximum of 20 dBm EIRP on point-to-multipoint and point-to-point installations; it also stipulates 17 dBm maximum transmitter power with 3 dBi in gain attributed to antenna and cable combination.
Question 4
What are two attributes used to characterize antenna performance? (Choose two)
A. attenuation
B. beamwidth
C. gain
D. harmony
E. interference
Answer: B C
Explanation
The fundamental characteristics of an antenna are its gain and half power beamwidth.
Some antennas are highly directional; that is, more energy is propagated in certain directions than in others. The ratio between the amount of energy propagated in these directions compared to the energy that would be propagated if the antenna were not directional (Isotropic Radiation) is known as its gain.
(An isotropic radiator will distribute its power equally in all directions)
Beamwidth is another of the important criteria since it specifies boundaries within the antenna radiation pattern, which are considered to be the limit of useful radiation (or reception).