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DNS Records Explained: A, AAAA, CNAME, MX, TXT and More

DNS Networking Infrastructure DevOps Cloud

DNS records are the building blocks that tell the internet how to route traffic, deliver email, and verify services. Learn how A, AAAA, CNAME, MX, TXT, NS, and other DNS records work with practical examples.

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15 Jul 2026 5 min read

Understanding HTTP Status Codes

Networking DevOps HTTP Web Servers Troubleshooting

Learn how HTTP status codes reveal what is happening between users, browsers, servers, and applications. This guide explains common 2xx, 3xx, 4xx, and 5xx responses and how DevOps engineers use them to troubleshoot real-world production issues.

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13 Jul 2026 6 min read

How DNS Actually Works

DNS Networking Infrastructure DevOps

A practical introduction to DNS, explaining how domain lookups work, how DNS servers communicate, and why understanding DNS is essential for DevOps and infrastructure work.

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12 Jul 2026 4 min read