Shulou(Shulou.com)06/03 Report--

After purchasing the CDN service, users will be more concerned about whether there is actual effect in the process of using it. First, we must first ensure whether it has been successfully opened, and then follow the basic steps to add the accelerated domain name and configure the CNAME. After these are successfully completed, we can test whether the CDN has been successfully accelerated. What is the role of CDN for website acceleration?

Why use cdn? cdn is website acceleration, which can solve the problems of slow website opening speed caused by cross-operator, cross-region, low server load capacity and too little bandwidth.

Different from traditional access methods, CDN network adds Cache layer between users and servers, and directs users 'access requests to Cache nodes instead of server source sites. The website visit process after using CDN cache evolves into:

1. The user enters the domain name to be accessed in the browser;

2. The browser sends a resolution request to the domain name resolution server. Since the CDN adjusts the domain name resolution process, the client generally obtains the CNAME record corresponding to the domain name. The browser needs to resolve the CNAME domain name obtained again to obtain the actual IP address of the cache server.

3. After parsing again, the browser obtains the actual IP address of the CDN cache server of the domain name, and sends an access request to the cache server;

4. According to the domain name provided by the browser, the cache server obtains the real IP address of the domain name source server through the internal dedicated DNS resolution of Cache, and then the cache server submits an access request to the real IP address;

5. After the cache server obtains the content from the real IP address, on the one hand, it saves it locally for later use, and at the same time sends the obtained data to the client browser to complete the response process of access; the user side displays the data returned by the cache server, thus completing the entire domain name access process.

Benefits of using CDN:

1. Don't worry about website visitors at any time, any place, any network operator, can quickly open the website.

2. The procurement costs of various servers, virtual hosts, bandwidth, etc., including the later operation and maintenance costs, will be greatly reduced.

3. The direct benefit to the website is that traffic, consultation volume, customer volume, and single volume will be greatly improved.

The above is an explanation of why cdn is used. For more information about cdn, click to see what high defense cdn is.

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