CCNA Objective 1.1.b covers Layer 2 and Layer 3 switches, and knowing the difference is critical. • Layer 2 switches keep traffic local, forwarding frames inside the same VLAN using MAC addresses. • Layer 3 switches do that plus routing, connecting different VLANs and subnets using IP addresses. Think of it this way: Layer 2 keeps the conversation inside one neighborhood, while Layer 3 connects neighborhoods together. For the CCNA exam (and real life troubleshooting), remember: • Access layer =
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