I do not understand the information on the hourly bandwidth report. For example, a given hour reports 964 MB download and 18 MB upload. If I click on the hour to get the usage by individual address, the report shows only 26 MB download and 4 MB upload. What are the purposes of the different reports, and why do they report different values? A similar discrepancy is also in the daily reports.
If I had to guess, the detailed hourly reports show actual traffic to and from the internet, while the summary reports show total traffic on the intranet, most of which does not go over the internet. Is this interpretation correct?