Computer Network.pptx
- 1. WEB CACHES IMPROVING WEBSITE PERFORMANCE
- 2. INTRODUCTION • Web caching is the activity of storing data for reuse, such as a copy of a web page served by a web server. It is cached or stored the first time a user visits the page and the next time a user requests the same page, a cache will serve the copy, which helps keep the origin server from getting overloaded. • Web caching is a technology that speeds up a webpage after it has been viewed for the first time. Caching accomplishes this by temporarily storing static assets (such as images, HTML, CSS, and JavaScript) from the webpage so it can be easily accessed later on.
- 3. HOW WEB CACHES WORK • Caching is the process of storing copies of files in a cache, or temporary storage location, so that they can be accessed more quickly. • Web caching works by caching the HTTP responses for requests according to certain rules. Subsequent requests for cached content can then be fulfilled from a cache closer to the user instead of sending the request all the way back to the web server.
- 4. TYPE OF WEB CACHES • WEB CACHES BROWSER: A temporary storage area in memory or on disk that holds the most recently downloaded Web pages. • WEB CACHES PROXY: Stores copies of frequently accessed web objects (such as documents, images, and articles) close to users and serves. • WEB CACHES CDN: A CDN, content delivery network, caches content (such as images, video or webpages) in proxy servers that are located closer to end users than origin servers.
- 5. CACHE HIERARCHIES • Local Cache: This is the first level of the cache hierarchy and is typically a browser cache that stores copies of web pages and assets from previously visited websites. • Network Cache: The network cache is located on a server or device within the user’s network. This can be a proxy cache, gateway cache, or a CDN cache. The network cache store copies of web pages and assets that are frequently accessed by user within the network. • Global cache: The global cache is located on a server or device that is outside of the user’s network. This can be a CDN or reverse cache located on the web server. The global cache stores copies of web pages that are frequently accessed by users from different regions of the world.
- 6. BENEFITS OF WEB CACHES • Faster website load times • Reduced server load and bandwidth usage • Improved user experience • Cost saving for website owners
- 7. LIMITATIONS OF WEB CACHES • Stale content issue • Privacy concerns • Compatibility issue • Limited storage
- 8. BEST PRACTICES FOR USING WEB CACHES • Set Appropriate Cache-control Headers • Use Cache Invalidation Techniques • Monitor Cache Performance • Implement Security Measures
- 9. CONCLUSION RECAP OF KEY POINTS • Web caching is a technology that store frequently accessed web content in a cache to improve website performance and reduce server load. • There are different types of web caches, including browser caches, proxy caches, and CDN caches. Each with their own advantages and limitations. • Web caching can significantly reduce the time it takes to load a website. • There some limitations and compatibility issue that must be considered. • To use web caching effectively, it is important to follow best practices such as setting appropriate cache-control headers, using cache-busting and invalidation techniques, monitoring cache performance, and implement security measures like SSL/TLS encryption.
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