High level architecture and implementation?

I’m new to Pega platform. I am about mid way through the System Architect trainings and I’m still a bit confused about the high level architecture of the system. Where can I look for a diagram or explanation of it?

there exists a similar question

Pega 7 Product and Components Overview and High level architecture | Collaboration Center

but I’m prompted with page errors when I follow the links.

Hi @SergioR4, Please check if this link helps: Pegasystems Documentation