Proxyvälimuistit

Proxyvälimuistit, also known as proxy caches, are intermediary servers that store copies of frequently accessed web content. When a user requests a resource, such as a webpage or an image, the proxy cache intercepts the request. If the requested content is already stored in the cache and is still considered valid, the proxy server delivers it directly to the user without needing to fetch it from the origin server. This process significantly speeds up content delivery and reduces the load on the origin server.

Proxy caches can be deployed in various locations, including within a local network or at internet service provider (ISP) level. They are particularly beneficial in environments with many users accessing the same external resources, such as corporate networks or public Wi-Fi hotspots. By serving cached content, proxy caches reduce bandwidth consumption and latency, leading to a faster and more efficient internet experience for users. Additionally, proxy caches can enhance security by filtering malicious content and providing a single point of access control. However, stale or outdated content can sometimes be served if the cache is not managed effectively.