Layer 2 vs Layer 3 Switch, What's the Difference？

Just like a hub is used to connect multiple devices in a Layer 1 network, for Layer 2, we use a device called “Switch”. This is because hubs don’t understand frames.

一般常用的交換器 Switch 是屬於第二層交換器 Layer 2 Switch，這種交換器是利用 OSI 第二層 MAC 位址的資訊來進行資料交換，它可以記憶學習第一個 Port 連接的 MAC 位址，透過 MAC 位址及封包目的的位址的辨別，L2 Switch 會將該封包直接傳送至連接目的地的 Port，而不會 ...

如果你曾經買過交換器（Switch），可能聽過有 Layer 2 和 Layer 3 的 Switch，或是被簡稱成 L2、L3。 但 Switch 的作用具體是什麼呢？

Layer 1 is fairly easy to understand. It covers the physical aspects of networking and is the lowest and most physical "rocks and blocks" layer of the model. Wiring standards play an important role in this layer, such as T568A and B for Ethernet

Explore the differences between Layer 1, 2, and 3 Ethernet switches, including their working principles, technologies, and performance factors. Learn about Layer 2 switching, Layer 3 routing, and how to choose the right switch for your network.

In this post, I’ll walk you through the differences between Layer 1, Layer 2, and Layer 3 switches in a way that actually makes sense—no jargon overload.

In summary, the choice between Layer 1, Layer 2, and Layer 3 switches depends on the specific needs of your network. Layer 1 switches are basic and suitable for simple setups, while Layer 2 switches provide more advanced functionality for most LANs.