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2.2.3. Wireless Infrastructure
Access Point (AP): Bridges wireless clients to the wired network. An autonomous AP operates independently with local configuration. A lightweight AP requires a wireless controller—the AP handles radio functions while the controller handles management.
Wireless Controller: Centrally manages multiple lightweight APs. Handles roaming (clients moving between APs), channel assignment (avoiding interference), power levels, and security policies. Enables consistent configuration across hundreds of APs from a single interface.
Antenna Types: Choose the antenna by the shape of the area to cover.
| Antenna | Coverage Pattern | Typical Use |
|---|---|---|
| Omnidirectional (e.g., dipole) | 360° around the antenna | Ceiling-mounted APs covering a room or floor |
| Patch/panel | Wide arc in one direction | Wall-mounted, covering a hallway or room from one side |
| Yagi | Focused beam in one direction | Long, narrow areas such as aisles; short building-to-building links |
| Parabolic dish | Very narrow, high-gain beam | Long-distance point-to-point links |
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Written byAlvin Varughese
Founder•20 professional certifications