DNS
Domain Name System (DNS) is a decentralized, hierarchical system that translates human-readable domain names into IP addresses, enabling seamless access to internet and network resources.
DNS allows users to connect to websites and services using memorable domain names instead of numeric IP addresses. It operates through a global hierarchy of servers, resolving queries and directing traffic efficiently across the internet and private networks.
Key features include scalable name resolution, caching for performance, support for various record types (A, MX, CNAME, etc.), and security extensions like DNSSEC. DNS is essential for web browsing, email delivery, global reachability, and load balancing.
Best practices involve redundant DNS servers, secure configurations, regular monitoring, and the use of DNSSEC to protect against spoofing and cache poisoning.