Our good friends at Microsoft released the Exchange Server 2013 Architecture Poster..

This poster highlights the significantly updated and modernized architecture in Exchange 2013, and highlights the new technologies in Exchange 2013, such as Managed Availability, the new storage and high availability features, and integration with SharePoint and Lync.  In addition, it illustrates the new transport architecture in Exchange 2013.

Download link available below

http://aka.ms/Ex2013ArchitecturePoster