Layer 7 Switching
The recent explosive demand for application hosting and increased security fueled the demand for a new concept called content switching, also known as Layer 7 switching, proxy switching, or URL switching. This switching technology basically inspects the payload, which is expected to be some HTTP request, such as a static or dynamic Web page. The content switch searches for a certain string, and if there is a match, it takes some type of action. For example, the content switch might rewrite the content or redirect it to a pool of servers that specializes in these services or to a caching server for increased performance. The main idea is that a forwarding decision is made based on the application data, not traditional Layer 2 ...
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