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P4 Programming Protocol-Independent Packet Processors
Building Programmable Networks Directly in Hardware Introduction Modern networks are no longer just passive packet-forwarding fabrics. They are expected to enforce security policies, perform real-time telemetry, mitigate attacks, and adapt dynamically to application needs. Traditional network devices, however, rely on fixed-function data planes, where packet parsing and processing logic is hard-coded into ASICs. This…
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Invisible Protocols When Networks Communicate Beyond the Reach of Packet Sniffers
Most engineers cling to the illusion that packet-level visibility is the final source of truth. It isn’t. Modern distributed networks have evolved to the point where parts of the system remain active, coordinated, and decision-capable even when no observable IP packets exist. Mesh architectures, SDN overlays, and embedded avionics networks increasingly exchange metadata through…