DNS stands for Domain Name System, which is a hierarchical and decentralized naming system used in the Internet to translate domain names, such as www.example.com, into IP addresses, such as 192.0.2.1, that can be used by computers to identify and communicate with each other. DNS can help to simplify the usage and management of the Internet, and to provide redundancy, security, and load balancing features. DNS can involve different types of servers, such as authoritative, recursive, or caching, and can use different protocols, such as DNSSEC, TCP, or UDP. DNS can also have some security and privacy issues, such as DNS spoofing, DNS hijacking, or DNS leakage, that can be mitigated by using DNSSEC, DNS-over-TLS, or VPNs.
