The principle of domain name resolution?
We all know that when a domain name is registered, it is necessary to resolve the IP address of the server to open the website through the domain name. However, many friends still do not know the principle of this resolution. Today, Xiaobian will tell you how the principle of domain name resolution is. And what to do if the domain name resolution is wrong.
What is the principle of domain name resolution
When the application process needs to map a host domain name to an IP address, the domain name resolution function is called. The resolution function puts the domain name to be converted in the DNS request and sends it to the local domain name server in the form of a UDP message. After the local domain name server finds the domain name, it returns the corresponding IP address in the response packet. At the same time, the domain name server must also have information to connect to other servers to support forwarding when it cannot be resolved. If the domain name server cannot answer the request, the domain name server will temporarily become another client in the DNS and send a request to the root domain name server for resolution. , and parse down until the requested domain name is queried.
What should I do if the domain name resolution is wrong?
To check whether the network or DNS is normal, it can be repaired through the "Network Repair Tool" in Tencent Computer Manager and 360 Security Guard software toolbox.
Try to access by changing browsers or devices.
If other domain names are accessible and only this domain name is incorrectly resolved, it may be that there is a problem in the resolution of the domain name administrator, which needs to be solved by the administrator. The website administrator can go to the domain name resolution administrator to check whether the resolution is correct and normal.
The so-called domain name resolution is to resolve the domain name into an identifiable IP address. If the domain name resolution is incorrect, the website will not be able to log in. Through the introduction of the editor, you must already know what the principle of domain name resolution is.