Technical diagrams (SharePoint Server 2010)
https://technet.microsoft.com/en-us/library/cc263199.aspx
Many of these resources are visual representations of recommended solutions. They include poster-sized documents available in formats including Microsoft Office Visio 2007 or Microsoft Visio 2010 files (.vsd), PDF files, and XPS files. You might need extra software to view these files. See the following table for information about opening these files.