What is CDN?
CDN is a content delivery network, and its full name can be Content Delivery Network or Content Distribution Network. The user's computer browsing the web accesses the web server closest to himself to read the data. In this way, the loading time of the website is accelerated and the use speed of the website is improved.
How CDN works
The operating principle of CDN is very similar to the warehouse configuration mechanism of e-commerce. In the early days of online shopping for a product, it could only be shipped from the merchant's warehouse or factory. Due to the limited geographical location, the buyer may have to wait 3 to 10 days to receive the goods. In order to shorten the delivery time, the industry established warehousing centers in various regions. , store the goods of the cooperative merchants in advance, no matter where the buyer is located, the merchant directly selects the warehouse center closest to the buyer for delivery, so the speed can be accelerated in 1~3 days to receive the goods. Similar to the warehousing mechanism, CDN also has the same principle. Through the Internet, a group of CDN servers in different regions, which are similar to the warehousing center, load data in advance to the origin server, which is like a factory, to store music, pictures, and videos. , applications, and other files, and access data faster by accessing the server closest to you.
Implementation of CDN
In the case of not using a CDN, when browsing a website, we usually enter the URL WWW... to access the Internet, the computer will first visit a server called DNS, and convert the URL into an IP address, such as 192.168.123.132. The IP location of the computer, so the computer knows which web server to access to read the website data and render the web page on the computer or smartphone in use.
In the case of using CDN, a CDN-specific resolution record will be added to the DNS server, so when we enter WWW... domain name, the computer will be directed to another dedicated CDN through the resolved IP address. The DNS server of the network, and this server will tell the computer to access another server responsible for load balancing. This server will reply to the computer according to the principle of proximity and less workload. Access the IP address of the CDN server, so the computer can find the most suitable CDN server to read the website information and present it to the user for browsing.
Not just speed up, but also prevent distributed denial of service (DDoS) attacks
In addition to helping to speed up the loading of website data and improving the user experience, because each time you browse the website, you do not need to obtain data from the origin site each time, which reduces the load of the transmission bandwidth and thus reduces the bandwidth cost. Of course, since each CDN server owns some website data of the origin server, it also indirectly provides backup effect. interrupt. Under the many CDN servers, the IP address of the origin server is hidden, and the origin server is also protected from common malicious attacks, such as distributed denial of service (DDoS).
MultiCDN also uses the appropriate CDN brand
multiCDN, the previous multi- can be interpreted as the meaning of multiple compound.That is, the service technology that integrates and manages the CDNs of various brands. CDNs of different brands form their own set of Internet, and their CDN servers are located all over the world, but it is impossible for the same CDN provider to have CDN servers in all corners of the world, and their cost and performance are also different. Therefore, integrating The CDN services provided by various suppliers can draw on each other's advantages to make the CDN more comprehensive in the world.
Qirui Technology | Guard your asset value
Qirui Technology has a professional IT team with more than 20 years, providing a full range of solutions. The application fields include government, education, finance, medical care, e-commerce, games, and technology. And imported internationally renowned public cloud services and computer room hosting, connecting private clouds and hybrid clouds, in response to the ever-changing information security problems, there are also CDN, DDoS and vulnerability scanning, dedicated to bringing you the best solution!
Qirui Technology has a variety of CDN technologies and can provide multiCDN advice and services for enterprises. Over the years, it has assisted many projects such as cross-border e-commerce, service websites, and Chinese network optimization. It has a strong background and experience. Please click the button below to learn more Lots of content!
- Taiwan/China/Hong Kong/Singapore/Japan/Korea high-speed nodes
- Accelerate online games and e-commerce transactions
- Improve website protection power
- Avoid malicious traffic attacks
- 7×24 customer service online anytime
