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.
Developers should learn DNS to understand how internet addressing works, which is essential for configuring web servers, managing domains, and troubleshooting network connectivity issues. It's particularly important for backend developers, DevOps engineers, and system administrators when setting up hosting, implementing load balancing, or securing applications with SSL/TLS certificates that rely on domain validation.