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41.
The orientation of an electromagnetic wave is best described by which one of the following?
- A.Phase
- B.Amplitude
- C.Modulation
- D.Polarization
- E.Azimuth
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| The orientation of the electrical and magnetic components of the electromagnetic wave with respect to the horizon is known as the polarization. |
42.
A Cisco dipole antenna is mounted so that it points straight upward and has a radiation pattern that extends in all directions horizontally. Which one of the following
best describes the antenna’s likely polarization?
- A.Horizontal polarization
- B.Vertical polarization
- C.Dual polarization
- D.Elliptical polarization
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| Cisco antennas are designed to use vertical polarization. Because the dipole antenna is mounted correctly (pointing straight up or down), the wave will be vertically polarized. |
43.
Which one of the following antennas would probably have the greatest gain?
- A.Patch
- B.Dish
- C.Yagi
- D.Dipole
- E.Integrated
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| A parabolic dish antenna has the greatest gain because it focuses the RF energy into a tight beam. |
44.
An omnidirectional antenna usually has which of the following characteristics?
(Choose two.)
- A.Low gain
- B.Small beamwidth
- C.High gain
- D.Zero gain
- D.Large beamwidth
- Answer & Explanation
- Report
Answer : [A and E]
Explanation :
Explanation :
| An omnidirectional antenna is usually used to cover a large area. Therefore, it has a large beamwidth. Because it covers a large area, its gain is usually low. |
45.
A standard indoor Cisco wireless access point is mounted on the ceiling and has
antennas that are hidden inside the case. Which one of the following describes the
antennas?
- A.Patch antennas
- B.Monopole antennas
- C.Omnidirectional antennas
- D.Isotropic antennas
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Integrated antennas are omnidirectional. |
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