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DNS: Definition
Visit DNS (Domain Name System) is a system that allows you to point a domain name to a IP addressmaking it easier to access a server. This process is called DNS resolution.
In practice, this means that rather than remembering the IP address of a website, you only need to remember its domain namewhich will be automatically translated into an IP address to access the server hosting the site.
Role of DNS
DNS does more than just point domain names to IP addresses. It can also contain other essential information, notably for managing emails (like MX records for sending and receiving e-mail). In addition, DNS can be used to create sub-domains by adding specific entries in the DNS zone.
DNS components
DNS scoring management is based on two key elements:
- Name servers (NS)) :
These are the DNS servers authoritarian for a domain. They are defined at your registrar (the company where you registered your domain name). These servers are responsible for providing DNS information to any request concerning the domain. - The DNS zone :
The DNS zone is a file containing the DNS records associated with a domain. It determines how different services (such as websites, e-mail, etc.) are directed. DNS records, such as A, CNAME, MXand others, specify the IP addresses and routes to which the domain and its sub-domains must point.
