domääneistä

Domääneistä refers to domains in the context of the internet. A domain name is a unique identifier that distinguishes a website or an online resource from all others. It is the human-readable address that users type into their web browser to access a specific site, such as "wikipedia.org" or "google.com". These names are easier to remember than the numerical IP addresses that computers use to locate each other on the network.

The system that manages domain names is called the Domain Name System (DNS). DNS acts as a directory, translating domain names into their corresponding IP addresses. When a user enters a domain name, their computer queries a DNS server, which then returns the correct IP address, allowing the browser to connect to the server hosting the website.

Domain names are organized hierarchically. The rightmost part of a domain name is known as the top-level domain (TLD). Common examples of TLDs include .com, .org, and .net. Below the TLD are second-level domains, which are typically the brand or organization name, like "wikipedia" in "wikipedia.org". Further subdivisions can exist, creating subdomains.

The registration of domain names is managed by domain registrars, accredited companies that allow individuals and organizations to purchase and manage their own domain names. The availability of a domain name is determined by whether it has already been registered by someone else. Choosing and registering a domain name is a crucial step in establishing an online presence.