According to various application environments, current wireless LANs typically adopt four main topologies: bridge-connected, access-node-connected, hub-accessible, and non-centralized. Each type serves different networking needs and is suited for specific scenarios.
1. Bridge-Connected Topology: This structure is primarily used for connecting wireless or wired LANs. When a direct wired connection is not feasible or too difficult to implement, a bridge-connected topology can be used to establish a point-to-point link. In this setup, wireless bridges facilitate communication between the two networks. These bridges act as routers and handle protocol conversion, allowing seamless data exchange between different network types.
2. Access-Node-Connected Topology: This configuration uses mobile cellular networks to enable communication. Each mobile station first receives information through a nearby access point (AP), then the data is sent via a wired network to a mobile switching center. From there, the information is distributed back to all wireless receiving stations. This allows users to receive signals throughout the coverage area and supports roaming capabilities, making it ideal for large-scale mobile networks.
3. Hub-Accessible Topology: In a wired LAN, a hub creates a star-shaped network. Similarly, wireless APs can be used to build a star-shaped wireless LAN that functions in a comparable way. However, in wireless environments, the AP usually needs to have basic internal switching capabilities to manage traffic efficiently among connected devices.
4. Non-Centralized Topology: This structure operates similarly to a wired peer-to-peer network. In this case, any two nodes in the network can directly communicate with each other without relying on a central controller. Each device acts both as a workstation and a server, making it highly flexible and suitable for small, dynamic networks where centralized control is not necessary.
By understanding these different topologies, network designers can choose the most appropriate structure based on the specific requirements of their wireless LAN deployment.
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