Page 277 of the DSE Security Knowledge Hub, with source-backed guidance, checklists, explainers, and playbooks.
Network quality needs defined paths, packet types, intervals, clocks, and statistics. Build directional baselines for delay, loss, and delay variation before users report a vague slowdown.
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First-hop source validation can restrict spoofed addresses near the access edge, but unmanaged exceptions and trust mistakes can cause outages. Inventory attachment types, learn bindings, pilot, monitor, and enforce deliberately.
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IPFIX can show who communicated, when, where, and how much—if observation points, templates, clocks, sampling, transport, retention, and collector health are engineered and tested first.
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Minimum-lux specifications cannot prove that a camera will capture usable color, motion, faces, clothing, or vehicles in a real scene. Build acceptance tests around the operational task and reproduce the darkest credible conditions.
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H.265 support on a camera does not prove that recording, live viewing, mobile playback, analytics, failover, or evidence export will work. Qualify the complete video path and keep a tested rollback before migration.
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Multicast can reduce duplicate video streams, but missing queriers, uncontrolled flooding, inconsistent IGMP behavior, routing boundaries, or silent failback can turn efficiency into an outage. Engineer and test the entire group path.
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An online camera can still be pointed wrong, obscured, unfocused, reflecting infrared, recording the wrong stream, or producing unusable exports. Audit image purpose, scene, hardware, recording, time, analytics, and evidence workflow together.
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A configured standby does not prove that all cameras will transfer, record, remain viewable, merge cleanly, and return under production load. Validate the exact failure, takeover, degraded operation, recovery, and evidence path.
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A cardholder export shows what the system grants, not what a person still needs. Have accountable role and area owners affirm required access, challenge exceptions, remove stale grants, and verify the controller received the change.
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Door behavior during loss of server, network, controller communication, reader, lock power, or fire-interface state must be designed—not discovered. Test each distinct door safely against approved life-safety and security requirements.
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