Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you about what the dns domain name resolution process is. The article is rich in content and analyzes and describes for you from a professional point of view. I hope you can get something after reading this article.

Dns is a distributed database that maps domain names and IP addresses to each other on the Internet. The dns domain name resolution process actually looks up the IP address through the domain name.

DNS makes it easier for users to access the Internet without having to remember the IP strings that can be read directly by the machine. The process of getting the IP address corresponding to the domain name through the domain name is called domain name resolution.

1. The browser first checks whether there is an ip address corresponding to the domain name that has been resolved in its own cache, and if so, the resolution is over. At the same time, the time when the domain name is cached can also be set through the TTL attribute.

two。 If it is not in the browser cache, the browser checks to see if there are corresponding parsed results in the operating system cache. The operating system also has a process of domain name resolution.

3. If the domain name has not been hit, you will really request the local domain name server (LDNS) to resolve the domain name. This server is usually located in a corner of your city, not very far away from you, and the performance of this server is very good. Generally, it will cache the results of domain name resolution, and about 80% of the domain name resolution will be completed here.

4. If LDNS still misses, skip directly to the Root Server domain name server to request resolution. The root domain name server returns to LDNS the primary domain name server address of the queried domain, and LDNS sends the request to the gTLD returned in the previous step.

5. The gTLD that accepts the request finds and returns the address of the Name Server corresponding to the domain name. This Name Server is the domain name server registered by the website. Name Server finds the target ip according to the mapping table and returns it to LDNS.

6.LDNS caches the domain name and the corresponding ip,LDNS to return the resolution result to the user, and the user caches it in the local system cache according to the TTL value, and the domain name resolution process ends.

The above is what the dns domain name resolution process is shared by the editor. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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