DNS

DNS (Domain Name System) is a hierarchical and decentralized naming system for computers, services, or other resources connected to the internet or a private network. It translates human-readable domain names (like example.com) into numerical IP addresses (like 192.0.2.1) that computers use to identify each other on the network, enabling users to access websites and services without memorizing complex numbers.

Also known as: Domain Name System, Domain Name Service, DNS Server, Name Resolution, Domain Resolution

Why learn DNS?

Developers should learn DNS to understand how internet infrastructure works, troubleshoot network issues, and configure domain settings for web applications. It's essential for deploying websites, setting up email servers, managing subdomains, and implementing security measures like DNSSEC or configuring CDNs.

Learning Resources

• docs: DNS Fundamentals
• video: DNS Explained in Detail
• tutorial: DNS for Developers
• course: Practical DNS Guide