Cisco CCNA (200-301)Network FundamentalsMedium
A network administrator is designing a new wireless network for a large warehouse. Due to the long aisles and open spaces, the administrator wants to use a type of antenna that focuses its signal in a specific direction to cover a longer distance. Which antenna type should be chosen?
- AOmnidirectional antenna
- BDirectional antenna
- CDipole antenna
- DPatch antenna
Show answer & explanationAnswer & explanation
Correct answer: B. Directional antenna
Directional antennas focus their radio frequency (RF) energy in a specific direction, creating a stronger signal and allowing for longer-distance coverage in a particular area, which is ideal for long aisles in a warehouse. Omnidirectional antennas broadcast in all directions, leading to weaker signals over distance in a specific direction.
Why the other options are wrong
- A. Omnidirectional antennas radiate signal equally in all horizontal directions, which is not suitable for focusing a signal down a long aisle.
- C. A dipole antenna is a basic type of omnidirectional antenna, often used as a standard antenna for APs, but still omnidirectional.
- D. A patch antenna is a type of directional antenna, but 'directional antenna' is the broader and more accurate category for the requirement.
Directional Antenna
A directional antenna is a type of antenna that radiates or receives electromagnetic waves more effectively in some directions than in others, concentrating its signal into a specific area.
- Focuses RF energy in a narrow beam.
- Provides increased gain and range in the intended direction.
- Examples include Yagi, panel, and parabolic dish antennas.
- Ideal for point-to-point links or covering specific long areas.
Memory trick: Omni is everywhere, Directional is a laser, Dipole is a basic stick.