One Mengxin was a little confused about Baidu DNS and Baidu Cloud Acceleration, and then Weieis blog gave a simple explanation, saying that Baidu has only one Baidu Cloud Acceleration. Looking back, Lao Wei went to search the Internet and found that this statement was wrong: I don't know when Baidu quietly launched Baidu DNS. So Lao Wei wanted to take this opportunity to popularize the difference and connection between DNS resolution and CDN acceleration for young people.
You can ask Du Niang about the terms of DNS resolution and CDN acceleration. Here, Lao Wei gives his personal experience about his own use experience, which may not be correct. You are welcome to criticize and correct.
DNS resolution
First of all, let's talk about Baidu DNS (also known as Baidu Cloud Resolution) mentioned by the cute new person above. Old Wei has not used Baidu products for a long time, and he has no idea about the existence of Baidu DNS. So I tried Baidu DNS and found that it is similar to DNSPOD. Enter the registered domain name address, and then add the server IP address to the resolution.
Looking through the help file, we can find that Baidu DNS provides a certain level of QPS protection capability and protection bandwidth, firewall equipment, high-speed access for all operators, and supports telecommunications, China Unicom, mobile, education network SEO and other multiple resolution lines support extensive resolution and load balancing, which are called permanent free without package differentiation (paid packages will not be excluded in the future). Technical support is provided by a senior DNS team, with 99.99% SLA (it can be seen that Baidu does not have its own technology, and it will cooperate with a DNS team in the initial stage, but will work alone in the later stage according to Baidu's habits).
At this point, it is necessary to mention DNSPOD, which is famous in China. DNSPOD is a DNS resolution system developed by Ah D himself. After years of development, it was acquired by Tencent and recently integrated into Tencent Cloud Acceleration.
that DNS resolution means that after you buy a domain name from a domain name provider, the DNS resolution provider provides the following functions: pointing the domain name to the server IP address, and providing free protection functions, firewalls, and other functions 。 For example, HiChina, now Alibaba Cloud, sells domain names, provides DNS resolution, and also provides paid CDN acceleration; DNSPOD now also provides domain name selling and DNS resolution functions. After integrating with Tencent Cloud Acceleration, DNSPOD integrates domain name, DNS service and CDN acceleration.
CDN acceleration
Let's talk about CDN acceleration. If it's too long, I won't be able to take pictures. As mentioned above, Baidu Cloud Acceleration (initially provided technical support by Accelerator, but later Baidu Cloud Acceleration did it alone) is the first CDN acceleration used by Old Wei. The free package I used can only be described as average. When I open the website, I often see the prompt "Error502 – Baidu Cloud Acceleration Node can't connect to the origin site", The paid webmaster who doesn't know how to use it can leave a message below. Many years ago, Weiaisi Blog used Baidu Cloud to accelerate for several months, and later switched to Tencent CDN.
There are also many CDN acceleration service providers in China. If you are interested, you can ask Du Niang. Later, you will write an article about the well-known CDN acceleration service provider in China.
CDN acceleration is a balanced mechanism that distributes your website to multiple server nodes across the country to speed up the opening speed of visitors. It also provides anti CC/DOS attacks, firewall functions, etc 。
Functionally, Baidu DNS DNSPOD AliCloud DNS resolution provides DNS resolution function; Baidu Cloud Acceleration - Tencent Cloud CDN - AliCloud CDN all provide CDN acceleration, Different families have different names.
The three giants of BAT attach great importance to DNS resolution of domain names and CDN acceleration. With a large-scale webmaster user, you can capture the latest network hotspots in time. The popular big data is played by BAT 666 times. It seems that Baidu can do nothing better than search. I remember that old Wei received several emails after he didn't use Baidu Cloud to accelerate, saying that XX function has been added. In short, don't leave, we can still serve you for 500 years for free. However, since he found a suitable CDN acceleration service, Lao Wei has never gone back. When it comes to CDN acceleration, he will not bother. I don't know how Baidu Cloud Acceleration's current user experience is, so I dare not comment on it.
So if you want to be a station, you should follow First buy the domain name, then do DNS resolution, and finally do CDN acceleration Such a step. Any of the three BAT companies can complete these three functions in a one-stop manner. You can listen to your opinions on how to choose.
As for how to use it, see the relevant articles here: Use DNSPOD and Tencent Cloud CDN to accelerate website access
Q&A:
Meng Xin asked: Can I do without CDN acceleration after DNS resolution? Can the website be opened normally?
Lao Wei replied: Yes, if you don't accelerate the CDN, your server IP will be directly exposed to the public network, giving people a chance to attack; In addition, for example, the server you bought is in Guangzhou, and the CDN acceleration function of the domain name is not added. Southern users can visit your website fairly fast, while northern users will open it slowly, even affecting Baidu's inclusion, crawling, ranking, and so on. After using the domain name CDN acceleration, others do not know your server IP and cannot attack your station from the IP. At the same time, the CDN acceleration service sends your station to servers all over the country and updates it regularly with the content updated by your station, so that visitors everywhere in the country can get an ideal opening speed, It is also good for search engine optimization.
