What is a domain?
Domain is an English word that means “area, territory, field.” Especially in the field of
IT
, a domain refers to a domain name used to identify devices and networks on the Internet.
The equivalent of an “address” on the Internet is an IP
address
. An IP address itself is a string of numbers, which is difficult for humans to handle, and a domain name is a string of characters that corresponds to an IP address and is assigned to make it easier for humans to identify.
In the case of ProFuture Inc.’s website, the “.co.jp/” part of “https://.co.jp/” is called the domain.
Domain names are managed by a system called DNS (Domain Name System), and DNS
servers
around the world work together to enable global translation of domain names to IP addresses. This conversion from a domain to an IP address is called name resolution.
Domain type
Domains are managed in a hierarchical structure, and each hierarchy is distinguished from the right by a “.” delimiter. Domains at the highest level are called top-level domains, such as “.com” and “.jp.” A domain created under a certain domain is called a subdomain.
When publishing a website using a free hosting service (rental server), etc., a subdomain or subdirectory of the domain managed by the hosting service is often allocated, but once you register the domain, you can You can assign the domain name you want to use. Domains that users can freely register are called unique domains.
Although there are maintenance costs to use your own domain, the advantage of using your own domain is that it increases the reliability of your website. For example, if your company’s website is published on a free hosting service, there is a high possibility that the domain name will be assigned a character string that has little relation to the company. Then, when a client looks at a company’s website, they may be concerned about whether it is really the company’s website or whether it is an impersonation. Therefore, by assigning a unique domain name related to your company name or service name, you can improve the reliability of your website.
Reference article
