---
title: Layer 3 vs Layer 2 Networking - What is the difference?
description: Layer 2 is beneficial for remote support. Layer 3 provides a more scalable network infrastructure. What´s the difference? Read our blog for more information.
---

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# [Layer 3 vs Layer 2 Networking - What is the difference?](https://blog.tosi.net/layer-3-vs-layer-2)

 Written by [kati.liedes](https://blog.tosi.net/author/kati-liedes) | Oct 6, 2021 9:00:00 PM

**The OSI networking model, not unlike a good burrito, has seven layers. And just like that, the analogy fails. Where each layer of the burrito is experienced and savored, a network engineer might only see layers 2 and 3 of the OSI model, leaving the remaining five layers in anonymity. **

This blog intends, in brevity, to demystify the two commonly used OSI layers and provide a practical guide on when to pick between layer 2 and layer 3 for remote and distributed applications.

First, an explanation.

*Layer 2*, known as the Data Link Layer, provides node-to-node data transfer with MAC address identification. All nodes on a layer 2 network are visible to one another. Ethernet switches are a common layer 2 example.

*Layer 3*, known as the Network Layer routes data packets to specific nodes identified by IP addresses. Visibility amongst nodes is point-to-point. As its function suggests, routers are a common layer 3 example.

Both have merits for different applications.

Layer 2 is beneficial for remote support. Enabling both the full functionality of most industrial protocols that sit atop ethernet *and* the ability to search for active IP nodes puts the programmer next to the machine, albeit virtually. There is no functional difference in this example between a layer 2 network and an ethernet cord.

Layer 3 provides a more scalable network infrastructure, like that used in a globally distributed system of machines connected to a central cloud for data analytics. Because data packets are *routed,* layer 3 enables 1-1 NAT and VLAN, among other traditional networking strategies. As distributed networks scale, layer 3 becomes more practical for managing connections.

If you would like more information on how to pick the right layer for your application, check our [helpdesk article](https://tosibox.service-now.com/customer_portal?id=kb_article_view&sysparm_article=KB0010091).

[View full post](https://blog.tosi.net/layer-3-vs-layer-2)

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