I have already discussed about proxy servers and its advantages. In this post i will explain about Caching Proxy servers
Caching Proxy servers: These are the proxy servers which keeps a copy of the previously accessed pages, images and other type of media in the server cache for some period of time. If the same user or any other user requset for the same file, the file is served from the cache of the server. After the cache time period expired, the file is removed from the cache. Most ISPs and large businesses have a caching proxy. Caching proxies were the first kind of proxy server.
Advantages of the Cache Proxy servers: As we can see that the web page, images and other media accessed by a user is stored in the cache. Next time these previously accessed pages are served directly from the cache not from the original server. So it reduces bandwidth consumption and faster access. The time of response is faster now. This is really good when you want to access some blogs which you have accessed before. Proxy server will serve the page from the serve cache even if the website is currently offline.
Disadvantages of Cache Proxy servers: Although Cache Proxy servers provide faster access to some frequent resources. But it has a big advantage. It is not good for those website which changes the content and media frequently.
Some poorly configured proxy servers also have some big advantages which creates problem in logging into a website. So use this proxy server with a good server administrator only.
But this advantage is not big now as most of th web masters are also optimize their website for caching and use some server side caching mechanisms by using CDNs. CDN cache static data of the website for the long period of time on the distributed servers.
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