If you have the file and need help opening it, you can generally use tools like WinZip or 7-Zip to extract the contents and see the file manifest.
(e.g., an internal company portal, a specific government website, or a software forum?) Download File DFNRIAC [2V] [24-09-2020].zip
Downloads with multiple parts (.z01 and .z02 files) If you have the file and need help