In order to enter the CDN, when adding a CNAME, it prompts that it conflicts with the A record. I don't know what to do and ask. Anyone with a little bit of experience knows how to solve this problem, but a novice encountered it and told him to delete the A record first, and then add the CNAME record.
The content of this article can't be simpler for those who can build a website, and it is more suitable for novices to figure out related concepts and operations at the learning stage, and clarify the easily confused knowledge points.
In other words, if you want to add CDN site-wide acceleration, there will no longer be A records in domain name resolution, only CNAME records.
The above is the operation of DNS resolution. This is not over yet, and you need to set it in the CDN acceleration background to add the server domain name to the source site IP, as shown in the figure below.
Finally, bind the domain name on the server side and wait a few minutes to open the website.
If you use https, you need to purchase additional https traffic, which is not expensive at the moment.