The topology structure of the local area network mainly includes

The topology of local area network mainly includes star, tree, bus and ring.

Topology refers to the way in which various sites in the network are connected to each other. In a local area network, it is specifically the connection form of file servers, workstations, cables, etc.

The most important topologies now include bus topology, star topology, ring topology, tree topology (evolved from the bus type) and their hybrids.

1. Star

The star topology is a radial interconnection structure with a central node as the center and connecting several peripheral nodes. Each node passes through the central node. Connected with points, the central node implements a centralized communication control strategy;

Therefore, the central node is quite complex and has a heavy burden. This structure is suitable for local area networks, especially in recent years, most of the local area networks connected use this connection method.

2. Tree shape

The tree topology evolved from the bus topology. It is shaped like an inverted tree, with the root at the top and branches below the root. Each branch can also Then take the sub-branch.

It is an extension of the bus structure. It is formed by adding branches to the bus network. Its transmission medium can have multiple branches, but does not form a closed loop. The tree network is a hierarchical network. Its structure can be symmetrical, the connections are fixed, and it has certain fault tolerance;

Generally, the failure of one branch and node does not affect the work of the other branch node, and the information sent by any node can be transmitted throughout the transmission The medium is also a broadcast network.

3. Bus topology

The bus topology is a topology based on multi-point connections, which directly connects all the devices in the network to a common transmission medium through corresponding hardware interfaces. superior.

The bus topology uses a common channel accessible to all PCs, and each PC only needs to be connected with one cable. In the bus topology, all online microcomputers are directly connected to the bus through corresponding hardware interfaces. The information of any node can be transmitted and diffused in two directions along the bus, and can be accessed by any node in the bus. take over.

4. Ring

Each node in the ring network is connected to a closed ring communication line connected end to end through the ring interface, that is, each PC is connected, and the data is sequentially connected along the ring. The destination is reached directly through each PC, and any node on the ring can request to send information. Once the request is approved, information can be sent to the ring.

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