Ode To Network Switches

Well, routers built the Internet, but it was network switches that scaled it. So, before we start, let’s get our terms correct. The transmission of data over Ethernet is defined at Layer 2 (Data Link Layer), and where we have a data frame. This data frame encapsulates a data packet, and which operates at Layer 3 (Network Layer). At Layer 5, we have the transport layer, and which defines a data segment.

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Prof Bill Buchanan OBE

Prof Bill Buchanan OBE

Professor of Cryptography. Serial innovator. Believer in fairness, justice & freedom. Based in Edinburgh. Old World Breaker. New World Creator. Building trust.