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Shenzhen JHA Technology Co., Ltd is one of the leading manufacturers of hardened Ethernet, PoE, and fiber connectivity products specifically designed for harsh and demanding environments.
09
2022
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08
What is a three-layer network architecture?
The three-layer network architecture adopts the hierarchical model design, that is, the complex network design is divided into several layers, each layer focuses on some specific functions, so that a complex big problem can be turned into many simple small problems. The network designed by the three-layer network architecture has three layers: the core layer (the high-speed switching backbone of the network), the aggregation layer (providing policy-based connections), and the access layer (connecting workstations to the network).
Core layer: The core layer is the high-speed switching backbone of the network and plays a vital role in the connectivity of the entire network. The core layer should have the following characteristics: reliability, high efficiency, redundancy, fault tolerance, manageability, adaptability, low latency, etc. In the core layer, high-bandwidth Gigabit switches should be used. Because the core layer is the hub of the network, its importance is prominent. It is very necessary for the core layer equipment to use dual-machine redundant hot backup, and the load balancing function can also be used to improve network performance.
Convergence layer: Convergence layer is the "intermediary" between the network access layer and the core layer, that is, aggregation is performed before the workstation accesses the core layer to reduce the load of the core layer equipment. The aggregation layer has multiple functions such as policy enforcement, security, workgroup access, routing between virtual local area networks (VLANs), and source or destination address filtering. In the aggregation layer, switches that support Layer 3 switching technology and VLAN should be selected to achieve the purpose of network isolation and segmentation.
Access layer: The access layer provides workstation access to the local network segment. In the access layer, reducing the number of workstations on the same network segment can provide high-speed bandwidth to workgroups. The access layer can choose ordinary switches that do not support VLAN and Layer 3 switching technology.
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