Point-to-multipoint (P2MP) WiFi, also known as wireless distribution system (WDS), is a networking technique used to extend a wireless local area network (WLAN) over a larger area. In a traditional WiFi setup, devices connect to a single access point (AP) to access the network. However, in a point-to-multipoint configuration, multiple remote access points are connected to a central access point, creating a network topology where multiple devices can connect to these remote access points, which then relay data to the central access point and vice versa.

Here are some key points about point-to-multipoint WiFi:

1. Topology: In a P2MP WiFi setup, there is a central access point (often referred to as the base station) and multiple remote access points (often referred to as client nodes). The remote access points are typically located in areas where direct connection to the central access point is not feasible due to distance or obstacles.

2. Coverage: Point-to-multipoint WiFi is used to extend the coverage area of a wireless network beyond the range of a single access point. This is particularly useful in outdoor environments such as campuses, industrial sites, or rural areas where deploying multiple wired connections may be impractical.

3. Scalability: P2MP WiFi networks can be scaled up by adding more remote access points as needed to cover larger areas or accommodate more users. This scalability makes it a flexible solution for various deployment scenarios.

4. Backhaul: The connection between the central access point and the remote access points is often referred to as the backhaul link. This link can utilize various wireless technologies such as point-to-point (P2P) links, mesh networking, or even wired connections depending on the specific requirements and constraints of the deployment.

5. Interference: One challenge in P2MP WiFi deployments is managing interference, especially in crowded wireless environments. Proper channel planning and frequency coordination are essential to minimize interference and optimize network performance.

6. Applications: Point-to-multipoint WiFi is commonly used for providing internet access in rural areas, extending WiFi coverage in large outdoor spaces such as parks or stadiums, connecting remote buildings in a campus or industrial setting, and other similar applications where extending the reach of a wireless network is necessary.

Overall, point-to-multipoint WiFi is a versatile networking solution that enables the extension of wireless coverage over large areas, offering flexibility, scalability, and cost-effectiveness compared to traditional wired solutions.