With Windows 10, Microsoft introduces a new method to get Windows Update. Before it, you can only download update from the Microsoft servers, but with Windows 10 you can also get update from computers already updated. It uses a technology like peer to peer (P2P).
By default, Windows tries to get update from Microsoft server, computer in your local network or from others computers on the internet. This new method speeds up the update download but it means that you can also send data to computers on internet. Depends on your upload rate, this can slow your internet navigation.
System Center Configuration Manager 2012 brought the possibility for a collection to refresh its members using Incremental Update. It means that the collection will periodically evaluate new resources only, and does not execute a Full Update Membership.
SCCM Collection Incremental
By default, the interval is set to every 5 minutes. But if you want to increase or decrease it, you can do it easily with the SCCM Console.