Basic knowledge of LAN switch configuration and purchasing

Today, medium-and small-sized enterprises all have dozens of computers and are used in all aspects of enterprise production and operation. How to connect all the computers in the office space to share resources and make full use of the overall effect needs to use the network equipment-LAN switches we will introduce today.
Basic knowledge
● Differences between vswitches and hubs
Vswitches and hubs are very similar in appearance. How can we tell the difference between them? Switch) is a device that works on the second layer, that is, the data link layer. It forwards data frames according to the MAC address. HUB is a device that works on the physical layer. It does not provide data exchange. It is equivalent to a cable that connects various network nodes, while the switch can provide a data channel between any two network nodes to prevent conflicts, it can meet the needs of current users for high-speed data exchange.
● Switch category
Vswitches are divided into storage forwarding and fast forwarding by forwarding type.
The storage and forwarding switch needs to perform CRC verification on the data packet after receiving a complete data packet. If an error occurs, the data packet is discarded and forwarded without any error. This will lead to a certain delay, however, data integrity is ensured.
The fast-forward switch does not verify frames. After receiving the data, it forwards the data immediately. The forwarding speed is fast, but it also forwards the wrong data packets.

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