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Why Networking Basics Should Come Before Docker or AWS Certifications

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A DevOps practitioner argues that foundational networking knowledge is widely skipped by engineers learning cloud tools, yet it underpins everything from Docker containers to Kubernetes clusters. Without a mental model of concepts like IP addressing, DNS, ports, and subnets, engineers often memorize commands without understanding why things break. The author recounts hitting this gap personally when unable to debug unreachable containers or misconfigured security groups. The article walks through core concepts layer by layer — covering subnetting, routing, firewalls, private IPs, and NAT — to build the mental framework the author wished they had learned first. The piece emphasizes understanding concepts before tackling the underlying binary arithmetic or tool-specific implementations.

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Why Networking Basics Should Come Before Docker or AWS Certifications · ShortSingh