Add README files and diagrams across repository

2026-05-06 06:36:53 +00:00
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+# labs/networking
+
+This folder is reserved for networking-focused exercises. It can hold examples around routing, DNS, ports, packet flow, and host-to-host diagnostics.
+
+## Diagram
+
+```mermaid
+flowchart LR
+  A["networking"] --> B["Routing"]
+  A --> C["DNS"]
+  A --> D["Firewall and ports"]
+  A --> E["Connectivity tests"]
+```
+
+## Notes
+
+- The directory is currently a placeholder.
+- It complements the operational network diagnostics already present in `infra-run/scripts/bash/os-healthcheck`.