From PowerPoint Diagrams of Azure Concepts & Architecture:
While working with multiple Enterprise teams as an Azure Consultant, I repeatedly use, modify and add to decks of PowerPoint slides that I customize for communicating Azure concepts to team members in various departments. Some of the slides are combinations of elements and/or concepts from all the Diagram Sources below. Links are provided for original diagrams where possible.
Diagram Sources:

2. Hub and Spoke Networks – 7 slides

 Download Hub and Spoke Network PPT deck

Get the Other PowerPoint Diagram Decks in this Series:

1. Governance – 3 slides
3. Security 
4. S2S, P2S, Express Route – 2 slides
5. DevTest Labs – 4 slides
6. Tools – 11 slides
7. Nginx – 6 slides
8. Miscellaneous – 4 slides
9. Icon Sets – 6 slides