What are the widely used network topologies in local area networks?

The most widely used network topology structures in local area networks are: star structure. Advantages of star topology: 1. Simple structure, convenient connection, relatively easy management and maintenance, and strong scalability; 2. Small network delay time and low transmission error; 3. Support multiple transmissions in the same network segment Medium; 4. Each node is directly connected to the central node.

The star topology consists of a central node and individual sites connected to the central node through point-to-point communication links. The central node implements a centralized communication control strategy, so the central node is quite complex, while the communication processing burden of each site is very small.

The switching methods used in star networks include circuit switching and message switching, with circuit switching being more common. Once a channel connection is established in this structure, data can be transmitted between the two connected sites without delay. The popular PBX (Private Branch exchange) is a typical example of star topology.

Advantages of star topology:

(1) Simple structure, convenient connection, relatively easy management and maintenance, and strong scalability.

(2) The network delay time is small and the transmission error is low.

(3) Support multiple transmission media within the same network segment. Unless the central node fails, the network will not be easily paralyzed.

(4) Each node is directly connected to the central node, faults are easy to detect and isolate, and faulty nodes can be easily eliminated.

Therefore, star network topology is the most widely used network topology.

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