What information is maintained by the domain name service system?

The information maintained by the domain name service system is: the correspondence between domain names and IP addresses. Domain Name System DNS is a core service of the Internet. As a distributed database that can map domain names and IP addresses to each other, it allows people to access the Internet more conveniently without having to remember IP numbers that can be directly read by machines. string.

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The information maintained by the domain name service system is: domain name and the corresponding relationship between IP addresses.

Since IP addresses are represented by numbers, it is very difficult for users to remember numbers. Therefore, the Internet provides a domain name service that assigns a host name to each host. This The host name consists of several parts, and each part corresponds to the corresponding part of the IP address.

DNS is the abbreviation of Domain Name System (Domain Name System). It is a core service of the Internet. As a distributed database that can map domain names and IP addresses to each other, it can make people access the Internet more conveniently. , instead of having to remember the IP number string that can be read directly by the machine. This is also the official statement of DNS.

To put it bluntly: communication is carried out through IP addresses on the Internet. However, IP addresses are expressed in numbers, which are difficult to remember (such as 116.213.120.232), so each IP is given a domain name that is easier for humans to remember (such as www.google.com), and DNS is used to resolve the domain name into IP (parsing the naming format that is easy for humans to understand into a format that computers can understand, and IP can also be translated into domain names)

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