CWS CWS WLAN Hardware and Antennas 2 — Questions and Answers
Question 1: What type of antenna radiates power equally in all horizontal directions while concentrating it in the vertical plane?
- Yagi antenna
- Omni-directional antenna (Correct answer)
- Parabolic dish antenna
- Patch antenna
Correct answer: Omni-directional antenna
Omni-directional antennas radiate energy equally in all azimuthal directions while providing some vertical gain by compressing the beam.
Question 2: Which connector type is most commonly found on consumer-grade WLAN access points for external antenna attachment?
- N-type
- RP-SMA (Correct answer)
- BNC
- TNC
Correct answer: RP-SMA
Reverse Polarity SMA (RP-SMA) connectors are the industry standard on consumer and prosumer WLAN equipment for antenna connections.
Question 3: A wireless bridge link requires covering 3 miles between two buildings. Which antenna type is most appropriate?
- Omni-directional dipole
- Rubber duck antenna
- High-gain directional antenna (Correct answer)
- Sector antenna
Correct answer: High-gain directional antenna
High-gain directional antennas focus energy toward a specific point, making them ideal for long-distance point-to-point links.
Question 4: What does EIRP stand for in the context of wireless networking?
- Effective Isotropic Radiated Power (Correct answer)
- Enhanced Internal Radio Protocol
- Equivalent Interference Rejection Point
- Effective Internal Radiation Pattern
Correct answer: Effective Isotropic Radiated Power
EIRP (Effective Isotropic Radiated Power) is the total power radiated by a system compared to an isotropic radiator, combining transmit power and antenna gain.
Question 5: When an antenna gain is listed as 6 dBi, what does the 'i' refer to?
- Indoor use rating
- Isotropic radiator reference (Correct answer)
- Interference immunity
- Installation standard
Correct answer: Isotropic radiator reference
The 'i' in dBi indicates the antenna gain is measured relative to a theoretical isotropic radiator that radiates equally in all directions.
Question 6: Which antenna design is typically used in enterprise ceiling-mount access points to provide 360-degree coverage in an open office?
- Yagi array
- Parabolic reflector
- Omni-directional ceiling antenna (Correct answer)
- Highly directional patch
Correct answer: Omni-directional ceiling antenna
Ceiling-mount omni-directional antennas provide 360-degree horizontal coverage, making them ideal for open office environments below the access point.
Question 7: What effect does increasing antenna height above ground level typically have on a WLAN outdoor deployment?
- Reduces Fresnel zone clearance
- Increases coverage range by reducing obstructions (Correct answer)
- Decreases EIRP output
- Narrows the horizontal beam width
Correct answer: Increases coverage range by reducing obstructions
Greater antenna height reduces the impact of ground-level obstructions and improves Fresnel zone clearance, extending effective range.
CWS CWS WLAN Hardware and Antennas 2
What type of antenna radiates power equally in all horizontal directions while concentrating it in the vertical plane?