- CDN (Content Delivery Network):
- CDN is a distributed network architecture that reduces the latency of users accessing content by storing content on servers in multiple geographical locations. These servers are typically located in various locations around the world, delivering content to users faster and reducing data transfer times across large distances.
- CDN is mainly used to accelerate the transmission of static resources (such as images, CSS, JavaScript, videos, etc.), reducing the load on the source server and improving the performance and availability of the website.
- CDNs also provide security and scalability benefits, caching content, protecting against distributed denial-of-service (DDoS) attacks, and automatically scaling resources when traffic surges.
- Nginx：
- Nginx is a high-performance web server and reverse proxy server that can also be used as a load balancer and cache server.
- Nginx can store and serve static resources. By configuring appropriate Nginx rules, static files (such as images, CSS, JavaScript, etc.) can be easily cached into memory to speed up the transfer of content. In this way, Nginx can reduce requests to the backend application server and improve performance.
- In addition, Nginx can also route requests to multiple backend servers through reverse proxy and load balancing functions to improve website availability and stability.
In general, both CDN and Nginx can be used to improve the access efficiency of static resources, but they have different uses and advantages. Typically, large websites may use both a CDN and Nginx to maximize performance and availability. CDN is used to distribute global static resources, while Nginx is used to cache and accelerate content transmission, as well as provide reverse proxy and load balancing functions for back-end servers.