Hotspot Question
You manage a multi-site deployment of Microsoft System Center 2012 R2 Configuration Manager.
You need to ensure that clients use only their preferred distribution points for downloading content.
Which objects and settings should you configure? To answer, select the appropriate objects and
settings in the answer area.
Answer: 
Explanation:
https://technet.microsoft.com/engb/library/gg712321.aspx#BKMK_DistributionPointConfigurations
Correct I guess, but why not distribution group points? If they are in the same site. And the question states: distribution points. So multiple
Groups don’t have boundaries. Boundaries would be the correct way to limit where a PC can download content from, so you’d have to pick DPs and not Groups.
DP Groups are meant for content distribution, QuaD is right, boundaries distinguish client content location. In 1610 and later, neighbor boundaries were implemented.