Domain name resolution process

Every computer on the Internet is assigned an IP address, and the transfer of data is actually between different IP addresses. Computers that we use when we are online at home are also assigned an IP address after connecting to the Internet. This IP address is dynamic in most cases. That is to say, you turn off the modem, and when you re-open the Internet, your Internet access provider will randomly assign a new IP address.

The web server is essentially a computer connected to the Internet, but it is more suitable as a server in the configuration, and it is placed in the data center to maintain a low temperature, low dust environment and security. These servers connect to the Internet using a fixed IP address. A domain name is parsed on a server, and the webpage file is placed on the server, and the user's computer knows which server to obtain the webpage information of the domain name. This is done through a domain name server.

The Domain Name Server is an abbreviation for English Domain Name Server. Each domain name must have at least two DNS servers, so that if one of the DNS servers has a problem, the other one can also return data about the domain name. There can be more than two DNS servers, but the DNS records on all of these DNS servers should be the same. The DNS record of the domain name is reserved in the DNS server, such as A record, MX record. The A record is used to specify the IP address corresponding to the host name (or domain name). The MX record is used to resolve the domain name of the mail server. In many cases.

When a viewer enters a domain name in the browser address box, or clicks on a link from another website to the domain name, the browser sends a domain name request to the user's Internet access provider. The DNS server of the business should query the domain name database to see what the DNS server of this domain name is. Then grab the DNS record into the DNS server, which is to get the IP address that the domain name points to. After obtaining the IP information, the access provider's server crawls the webpage content on the server corresponding to the IP address, and then transmits the content to the requesting browser.