You learned the physical and data link layer foundations. Ethernet moves frames using MAC addresses at speeds from Mbps to Gbps. Each frame has a preamble, addresses, type, payload, and FCS. Switches replaced hubs by creating separate collision domains. Switches learn MACs, then flood, forward, or filter. Store-and-forward checks integrity. Cut-through minimizes latency. Next, you'll build on this with VLANs and Layer switching.
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$ curl repovive.com/roadmaps/network-design/physical-and-data-link-fundamentals/section-1-recap
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