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 infrastructure works, as it is fundamental for web development, networking, and system administration. It is essential for configuring domains, managing server deployments, troubleshooting connectivity issues, and implementing security measures like DNSSEC or load balancing across multiple servers.