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Differences between Layer 2 and Layer 3 network switch

Everyone knows something about Layer 2 and Layer 3 networks, but how much do you know about the differences between them? JHA Techr will take you through it.


  1. Layer2

The Layer2 network structure mode with only core layer and access layer is simple to operate. The switch forwards data packets according to the MAC address table.

 If there is any, it will be forwarded, if not, it will be flooded, that is, the data packet will be broadcast to all ports. If the destination terminal receives a response, the switch can add the MAC address to the address table. This is how the switch establishes the MAC address. process.

 However, such frequent broadcasting of data packets with unknown MAC targets will cause a huge network storm in a large-scale network architecture. This also greatly limits the expansion of the second-layer network. Therefore, the Layer2 network The networking capabilities are very limited, so they are generally only used to build small LANs.


  1. Layer3

Different from the Layer2 network, the Laye3 network structure can be assembled into large-scale networks.

 The core layer is the supporting backbone and data transmission channel of the entire network, and its importance is self-evident.

Therefore, in the entire Layer3 network structure, the core layer has the highest equipment requirements. It must be equipped with high-performance data redundant switching equipment and load balancing equipment to prevent overload, so as to reduce the amount of data carried by each core layer switch.


JHA Tech, are the original manufacturer has been dedicated to the R&D, production, and sale of Ethernet Switches, Media Converter, PoE Switch&Injector and SFP module and many related products for 17 years. Support OEM, ODM, SKD and so on.



The software supporting JHA Tech managed switches, L2 and L3 are the same software operating system, which brings convenience to customers. The picture above shows the customization functions that JHA Tech can achieve with the software interface.


BUGs raised on site can be fixed within 30 minutes at the earliest. New features requested by customers can be released as upgrade packages within 7 days at the earliest. There will be no additional upgrade fees.


Do you have questions about Switch’s use, or want to purchase more models to attract more customers? If you need any assistance, please leave your email address and we will have an expert contact you for one-on-one answers.