Networking for DevOps Roadmap
TCP/IP, DNS, HTTP/TLS, and the troubleshooting toolkit — the networking fundamentals every DevOps engineer needs.
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Models
The conceptual frameworks that make networking make sense.
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Seven layers vs four — and which one actually matters.
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Addressing
IP addresses and how networks are carved up.
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IPv4 classes, public vs private, and CIDR notation.
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Subdividing address space for VPCs and on-prem networks.
- Subnet calculator optional
Plan subnets interactively.
- CIDR checker optional
Verify whether an IP falls inside a CIDR block.
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Name resolution
How hostnames become IP addresses.
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Resolvers, records (A, CNAME, MX, TXT), and TTLs.
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Transport & app
The protocols your services speak.
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Connection-oriented reliability vs low-latency datagrams.
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Request/response, status codes, TLS handshake.
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Edge
Traffic management at the boundary of your infrastructure.
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Round-robin, least-connections, health checks.
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Stateful vs stateless packet filtering.
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Troubleshooting
Diagnose network problems systematically.
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ping, traceroute, dig, ss, tcpdump — when to use which.
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