There's a terminology you often hear when building a website with WordPress:CDN(Content Delivery Network). Many website builders recommend turning on "CDN acceleration" to increase the speed of your website. However, for beginners, this concept may be unfamiliar. In this article, we'll explain the basics of CDNs, their benefits, and how they're used in WordPress.

I. What is CDN?

CDN, full name "Content Delivery Network" (Content Delivery Network).

It consists of data nodes distributed across the globe. These nodes cache the static content of a website. When a visitor enters a website, the CDN system delivers the content from the node closest to their geographic location instead of loading it from the original host of the website.

This mechanism can be understood as building multiple local "content repositories", where each visitor reads resources from the closest repository, thus increasing the number of(of cargo etc) loadEfficiency.

Second, the working principle of CDN (common understanding)

Assuming that the siteserver (computer)It is located in Singapore, while visitors come from Taiwan, the United States, Europe, etc. Without a CDN, each visitor request would have to travel a long way to Singapore. Without CDN, every visitor request would have to take a long way to connect to Singapore, and the speed would be affected by geographical distance and network links.

After the introduction of the CDN:

• Taiwan visitors can directly connect to data nodes in Taipei
• U.S. visitors can access resources from the Los Angeles node
• European visitors are connected to the London or Frankfurt nodes.

The main server will no longer be responsible for all the resource transfer, and the static files will be distributed by CDN nodes to improve the overall response efficiency.

The main benefits of CDNs for WordPress websites

1. Speed up page loading

With the multi-location delivery mechanism, visitors do not have to wait for the remote host to respond, and page load times can be dramatically reduced.

2. Reducing the burden on the mainframe

Images from the website,CSS Static resources such as stylesheets, script files, etc. can be cached to CDN nodes, reducing the need for hosts to handle repeated requests frequently.

3. Improving site accessibility

Even if the main server fluctuates for a short period of time, the CDN node can still provide(computing) cachecontent, to ensure that the basic functions of the site are functioning properly.

4. Contribute to search engine optimization

The page load time isInternet search engineOne of the ranking reference factors. Improvements in site access speed have a positive impact on search performance.

5. Enhancement of basic protection capabilities

Some CDN services have defenses DDoS Attacks, blocking of malicious IPs and other functions can provide basic security protection for the site.

What can be enabled for CDN acceleration in WordPress?

CDN is available for all static resources, including:

• Images (jpg, png,webp (etc.)
• Video (mp4, webm, etc.)
• CSS Style Files
• JavaScript Script File
• Font files (woff, ttf, etc.)

These resources are usually a major component of page load time and have a large impact on the speed of website access.

V. Types of WordPress websites that are suitable for using CDNs

CDNs are suitable for most sites, with the following types of performance being more pronounced:

• Websites for global or national visitors
• Content contains a lot of images or video resources

• Higher traffic and frequent page loadsblog (loanword)or e-commerce station
• Sites where hosting is deployed at a distance from the location of the primary visitors

If the website is mainly display-oriented and has a low number of visitors, you can also choose whether to configure CDN according to the specific situation.

VI. Summary

CDN It is an important part of building an efficient WordPress website, which can effectively improve the loading speed, reduce the pressure of hosting, and to a certain extent, improve the stability and security of the site. By reasonably introducing CDN services, you can provide a faster and smoother access channel for your website.

For beginners, mastering the basic concepts and applications of CDN is a very practical step in the process of website optimization. According to the type of site and the scope of access, you can flexibly configure the appropriate CDN service platform and plug-in tools.

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