What is the difference between layer 2 and layer 3 networking?

Difference between Layer 2 and Layer 3 Networking

Layer 2 and Layer 3 networking are different layers in the OSI model that define how data is transferred across networks. Below are the key differences between Layer 2 and Layer 3 networking:

Layer 2 Networking:

1. Operates at the Data Link layer of the OSI model.
2. Uses MAC addresses to identify devices on the network.
3. Handles switching and VLANs to segment traffic within a local network.
4. Common devices at Layer 2 include switches and bridges.

Layer 3 Networking:

1. Operates at the Network layer of the OSI model.
2. Uses IP addresses to route data between networks.
3. Handles routing and forwarding packets between different networks.
4. Common devices at Layer 3 include routers and Layer 3 switches.

Understanding the difference between Layer 2 and Layer 3 networking is essential for network engineers to design, implement, and troubleshoot complex network infrastructures.