The home page gives you a good idea about all of your network interface controllers (NIC) by returning a count of network cards. It further breaks-down the number of NIC and displays this data in a chart and a table which are both interactive.
If you drillthrough on a specific NIC, you will see its related page, List of Computers by Network Interface Controller. Power BI, by default, displays all results. Once a filter is selected, for example, the Collection Name, it remains in place until replaced by another filter. Filters are generally enabled when you drillthrough from one page to another page.
In the footer of all pages, you’ll see, Date Last Refreshed. This information tells you when the NIC data was last queried and imported from SCCM into Power BI.