HOTSPOT
Your network contains an Active Directory forest named contoso.com that contains a single domain. The forest contains three sites named Site1, Site2, and Site3.
Domain controllers run either Windows Server 2008 R2 or Windows Server 2012 R2.
Each site contains two domain controllers. Site1 and Site2 contain a global catalog server.
You need to create a new site link between Site1 and Site2. The solution must ensure that the site link supports the replication of all the naming contexts.
From which node should you create the site link? To answer, select the appropriate node in the answer area.
Answer: 
Explanation:
Create a Site Link
To create a site link
– Open Active Directory Sites and Services. To open Active Directory Sites and Services, click Start, click Administrative Tools, and then click Active Directory Sites and Services. To open Active Directory Sites and Services in Windows Server® 2012, click Start, type dssite.msc.
– In the console tree, right-click the intersite transport protocol that you want the site link to use.
Use the IP intersite transport unless your network has remote sites where network connectivity is intermittent or end-to-end IP connectivity is not available. Simple Mail Transfer Protocol (SMTP) replication has restrictions that do not apply to IP replication.
Reference: Create a Site Link p://technet.microsoft.com/en-us/library/cc731294.aspx