A domain is a section of the Internet with addresses that share a common suffix or are under the control of a particular organization or individual. It is hierarchically organized. Both physical and virtual objects can be addressed with the domain name. These objects can be websites, network computers, or services, such as printers, faxes, or mail servers.
Each object is referenced by a unique IP address, but is included in the namespace, in other words, a domain for the purpose of distinction and clarity. A domain can be made up of the letters A through Z, the numbers 0 through 9, hyphens (only in certain places), and other characters from the Unicode character set.
General information
If a user wants to enter a website, he can enter the IP address of the web server if he knows it. But, because IP addresses are difficult to remember and users have no idea what the address represents, the Domain Name System (DNS) was introduced. This system has significantly increased the usability of the Internet in general and of individual websites, since users can access resources even when they do not know the IP address. Each domain must be based on this global naming system.
Strictly speaking, DNS is organized as a hierarchical tree structure. The startup element is the root directory, which is located on the server along with other HTML documents and scripts.[1]
However, this directory is not visible to users. It is only logged internally within the system. The visible parts of a domain are of most interest to users. These are in turn part of the URL, but should not be confused with it. A URL can also point to individual files on the server. A domain includes all files in their entirety. The domain is a range of addresses and the URL is an address.
Features
The domain www.example.com is divided into three visible parts and one invisible part according to DNS. The individual parts are syntactically separated by a period.
www.example.com
- .com denotes the top-level domain. It is a country code or an indication of the domain function (for example, .com for commercial, .biz for business, or .org for organization). Recently, even city names are available as domains, like .london.
- example is the second level domain. This is the actual namespace of the domain.
- www denotes third-level domain. Here you can also list special services, eg blog. for a blog or mail. for a mail server. An additional division into subdomains can assign departments of a global company, for example.
- The invisible part is the root directory, which is located on the web server. This is indicated through a period after .com, but is not visible in the web browser. The period is used to uniquely reference the object on the server, making it a fully qualified domain name (FQDN).
Importance for SEO
The domains have a very high reputation in the field of SEO and in this field there are several significant aspects.
1. The namespace of a domain can contain keywords and thus is an important criterion for positioning and for users to successfully find what they want. (Exact Match Domain (EMD)).
2. If the abbreviation www. is ignored in the top-level domain, it is also advisable to avoid duplicating content. Sometimes the same content is achievable under two domain names.
3. In .es, for example, you can only enter addresses exclusively from Spain. If you want to target international clients, it is recommended to have subdomains with the abbreviations of the respective country or an appropriate functional address, such as .com. Apart from this, there are aspects that must be mentioned that refer to the age, backlinks, fame, and neighborhood of a domain. The keywords are domain popularity, domain authority, domain trust, and bad neighborhood. These multiple aspects are indicators of the quality of a domain and significantly impact the success of a website.
Web Links
