Explain about caching proxy of IBM Web sphere Edge sphere

A caching proxy can be configured in forward direction or as a proxy. Content requested by the user is cached by edge before sending or adhering to the query. Page fragments arising from JSP or servlets are cached by Edge and the caching process is slow. Performance and scalability of J2EE applications can be increased by edge

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ERROR: Port values must be a positive integer between 0 and 65535. while install IBM Http Server 8.5.5

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