How to Distinguish Between Layer 2 Switches and Layer 3 Switches

Table of Content [Hide]

The main differences between layer 2 switches and layer 3 switches lie in the OSI model layers at which they operate and their functions. They can be distinguished from the following aspects.

1. Operating Layers

Layer 2 Switch: It operates at the data link layer (the second layer) of the OSI model and forwards data frames based on MAC addresses.
Layer 3 Switch: It operates at the network layer (the third layer) of the OSI model and is capable of routing and forwarding based on IP addresses.

2. Forwarding Criteria

Layer 2 Switch: It forwards data frames according to the MAC address table and is mainly used for device communication within the same network.
Layer 3 Switch: It forwards data packets based on IP addresses and routing tables and supports communication between different networks.

3. Functions

Layer 2 Switch: It is mainly used for data switching within a local area network (LAN). It supports VLAN (Virtual Local Area Network) division but does not have routing functions.
Layer 3 Switch: In addition to layer 2 switching functions, it also has routing functions and can enable communication between different VLANs or subnets.

4. Performance

Layer 2 Switch: It has a fast forwarding speed and low latency, but it is limited to communication within the same network.
Layer 3 Switch: While maintaining high - speed forwarding, it adds routing functions, making it suitable for complex network environments.

5. Application Scenarios

Layer 2 Switch: It is suitable for small - scale local area networks, such as office or home networks.
Layer 3 Switch: It is suitable for medium - to large - scale networks that require routing functions, such as enterprise networks or data centers.

6. Costs

Layer 2 Switch: It has a lower cost and is suitable for simple network requirements.
Layer 3 Switch: It has a higher cost and is suitable for complex network requirements.

In summary, layer 2 switches are suitable for simple LAN communication, while layer 3 switches are suitable for complex network environments that require routing functions. The choice should be determined based on the network scale and requirements.

References

Tips for Using Virtual Local Area Networks (VLANs)

DIN-RAIL Industrial Switch

Recommended Industrial Network Switches

24 1000Base-Tx PoE and 4 1000Base-Fx Switch

FSHKLE55-K80C SFP+ 10Gb/s Dual Fibers 1550nm SM80km DDMI

Managed 2 40G Qsfp+ and 8 25G SFP28 and 8 10G SFP+ and 16 1G Base-T Switch F5E300TXYQ-16882

F6-5800-5P DIN-RAIL Industrial Unmanaged 5 1G Base-Tx Poe Switch

Latest Industrial Network Switch News

Feb

2025

Feb 24 2025

Introduction of OEM Ethernet Switches

In today's network architecture, Ethernet switches is very important. They not only allow data packets to be exchanged between devices but also bring many features that can optimize network perfor...

Jun

2025

Jun 28 2025

Empowering High-Speed Networks: A Deep Dive into Fibre Optic Transceivers

In an era of explosive data growth and digital transformation, reliable high-speed communication is the backbone of every modern network. At the heart of fiber infrastructure lies a compact yet powerf...

Oct

2024

Oct 12 2024

Tips for Using Virtual Local Area Networks (VLANs)

Tips for Using Virtual Local Area Networks (VLANs)Jipeng LV-Beijing Fibridge Co., Ltd.Virtual Local Area Network (VLAN) is a powerful network technology that allows a physical LAN to be divided into m...