domäänisid

Domäänisid, often referred to as domain names, are user-friendly identifiers for resources on the internet. Instead of remembering complex IP addresses, such as 192.168.1.1, users can access websites and services using easily memorable names like "wikipedia.org". These names are translated into IP addresses by a distributed system called the Domain Name System (DNS). Think of DNS as the internet's phonebook, connecting human-readable domain names to their corresponding machine-readable IP addresses.

The structure of a domain name is hierarchical, with different levels separated by dots. The rightmost part is known as the Top-Level Domain (TLD), such as .com, .org, or .net. These TLDs can indicate the type of organization or geographical location. Below the TLD are Second-Level Domains (SLDs), which are typically the name chosen by an individual or organization, like "google" in "google.com". Further subdivisions are possible, creating Subdomains. For example, "mail.google.com" uses "mail" as a subdomain.

Registering a domain name involves a process through domain registrars. These registrars are accredited by organizations like ICANN (Internet Corporation for Assigned Names and Numbers) to manage domain name registrations. Once registered, a domain name typically belongs to the registrant for a specified period, which can be renewed. The availability of specific domain names is checked against a global database to ensure uniqueness.