October 15, 2023
In network design projects, we usually draw network topology diagrams. The editor compiled some more general network topology diagrams for Xiaobai's reference.
1. Bus Structure
Just look at topology diagram, in a word, all devices are directly connected to bus. The biggest advantage is that cost of network is low. This structure does not require additional network equipment and is directly connected via bus, so it can greatly save on costs. The biggest disadvantage of a bus structure is that all data must be transmitted over bus, and if bus fails, entire network will be paralyzed.
2. Star Structure
In a star topology, each node in network is connected to a central node (also known as a central transmission station, typically a hub or switch) through a point-to-point connection, and central node transmits data to destination. node information.
3. Hybrid topology
A hybrid topology is a topology that combines two or more separate topologies and takes advantage of both. Such a topology can better meet expansion of a larger network, solve problem of limiting number of connected users in a ring topology or a bus topology, and at same time solve problem of limiting transmission distance in a star topology.
Hybrid topology benefits:
1. Fault diagnosis and isolation is more convenient. In event of a network failure, it is enough to determine which network device is faulty and isolate network device from entire network.
2. Expands easily. You can add new network devices, and you can also reserve a few spare ports on each network device.
3. Ease of installation. The main link of network only needs to connect aggregation layer device, and then connect aggregation layer device and access layer device through a spur link.
Disadvantages of hybrid topology:
1. It is necessary to select intelligent network equipment to automatically diagnose network faults and isolate faulty nodes, and cost of building a network is relatively high.
2. Depends on central node. If equipment connected to center fails, entire network will be paralyzed, so requirements for reliability and redundancy of central equipment are very high.