Understanding Network Layers: L1, L2, and L3 in Action!
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Understanding Network Layers: L1, L2, and L3 in Action!
Efficient network design is all about layered architecture, ensuring scalability, security, and seamless communication between devices. This visual breakdown demonstrates how Layer 1 (Physical), Layer 2 (Data Link), and Layer 3 (Network) work together in a real-world network setup.
✅ Layer 1 (Physical) – The foundation of networking, involving cables, switches, and wireless access points. Power over Ethernet (PoE) and switch uplinks ensure connectivity.
✅ Layer 2 (Data Link) – Handles MAC addressing and VLANs to segment traffic. Trunk ports carry multiple VLANs, while access ports provide dedicated VLAN access.
✅ Layer 3 (Network) – Responsible for subnetting and IP addressing. VLANs are assigned unique subnets, ensuring proper routing and isolation.
📌 Key Takeaways:
🔹 VLANs improve security and traffic management.
🔹 Trunk ports allow multiple VLANs on a single connection.
🔹 Subnetting ensures efficient IP address allocation.
Understanding these layers is crucial for anyone in network engineering, cybersecurity, or IT infrastructure management.