1. Backplane Bandwidth: Determines the maximum upper limit of the connection bandwidth between each interface template and the switching engine.

Backplane bandwidth is the maximum amount of data that can be throughput between the switch interface processor or interface card and the data bus. The backplane bandwidth signifies the total data exchange capacity of the switch in Gbps, also known as the switching bandwidth, and the backplane bandwidth of a typical switch ranges from a few Gbps to hundreds of Gbps. The higher the backplane bandwidth of a switch, the more data it can handle, but at the same time, the higher the design cost will be.

2, switching capacity: the core indicators

3, packet forwarding rate: the size of the switch's ability to forward packets

The three are related to each other, the backplane bandwidth is high, the switching capacity is large, the packet forwarding rate is high. The switch is the most important network connectivity device in the LAN, and most of the LAN management will involve the management of the switch.

Managed switches support the SNMP protocol, which consists of a set of simple network communication specifications that can accomplish all basic network management tasks, with low demand for network resources and some security mechanisms.The working mechanism of the SNMP protocol is very simple, and it mainly realizes the exchange of network information through a variety of different types of messages, i.e., PDUs (Protocol Data Units). Exchange. However, managed switches are much more expensive than the unmanaged switches described below. There are also managed switches that offer policy-based QoS (Quality of service). Policies are rules that control the behavior of the switch and are used by network administrators to allocate bandwidth, prioritize application flows, and control network access, with a focus on the bandwidth management policies required to satisfy service level agreements and the manner in which the policies are issued to the switch. Multi-function light-emitting diodes (LEDs) at each port of the switch to indicate port status, half/full duplex, and 10BaseT/100BaseT, as well as switch status LEDs to indicate system, redundant power supply (RPS), and bandwidth utilization, form a comprehensive and convenient visual management system. Most switches below the departmental level are mostly unmanaged, with only enterprise and a few departmental level switches supporting managed features.