The difference between Layer 3 and Layer 2 networks

For network engineers and architects, understanding the difference between a Layer 3 and Layer 2 network can greatly enhance the overall security and speed of your network infrastructure.

Generally speaking, Layer 2 is a broadcast Media Access Control (MAC) MAC level network, while Layer 3 is a segmented routing over internet protocol (IP) network.

To better understand both layers, let’s dig a little deeper into the OSI model.

Understanding the OSI 7 layer model
OSI stands for Open Systems Interconnection. It is a model used to standardise the functions of telecommunication and computing systems around the world. OSI 7 is conceptual, as the layers are abstractions that don’t define the actual technology used; however, the network topology and interoperability can be designed.

But what does that actually mean? In Information Technology, standardisation is abstract so that providers, manufacturers, programmers and everyone involved has a model to work with that provides a uniform level of understanding. This enhances the interoperability of the different systems and processes, so they can work with each other.

OSI layers
Each layer in the OSI model serves the layer above it. There are seven layers in total in the OSI model.

Read more : level 3 network

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