What is ICAP/WCCP and NetCache servers?

Hi there,

Let me put my requirements.
I have few contents in my web server (weblogic). The contents are of type pdf, doc or weburls.
My end user wants to download these contents. In order to facilitate him to make the download safe and also formonitoring the download (whether properly downloaded or not), I am thinking of using ICAP / WCCP.

Hence in this regard can somebody guide me from the baseline how to use the ICAP /WCCP in my web server.

What are all the necessary things I should have to do this?

If somebody explain to me in detail in a programmer perspective, I’ll be much thankful to you.

Awaiting your valuable feedback.

Regards,

Venkat