I have a couple of question:
1. How to upgrade Akamai NetSession Interface API - AKAMAI.C, is there a new version available, how to check.
2. Is there documentation on above API files?
Lei Liu, the NetSession Download Manager documentation is available in Luna. And you should be able to get the latest version of the C API from your account representative.
...moving to Media Delivery space, because Netsession belongs to this product family.
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