According to different applications and functions, typical hierarchical design models can be divided into core layer, aggregation layer, and access layer. Accordingly, network switches can also be divided into core switches, aggregation switches, and access switches.
According to different functions and configurations, the ports of network switches are mainly divided into two categories: uplink ports and ordinary ports. Among them, the uplink port is a port connected to the aggregation or core layer or a port of the WAN Internet egress, which is simply a port for uploading data.
The uplink port on a network switch is usually a high-speed port on the switch, which is mainly used to connect devices or a small local network to a larger network, or to other high-speed devices in the topology (such as high-speed switches). ). Ordinary ports are ports used for conventional data transmission. Common types include RJ45 ports, SFP ports, SFP+ ports, SFP28 ports, QSFP+ ports, and QSFP28 ports. These ports can rely on different cables (such as optical fiber or twisted pair). Line) to achieve network connections with different transmission rates and transmission distances,
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