The source for the diagrams, can be found as
.graphml at the same path as the images.
Basic Cluster with HDDs and SSDs
Cluster with RGW for S3-compatible Object Storage
No direct OSD access network is required by the consumers of the object storage. (^ the big advantage over CephFS)
Cluster with MDS CephFS
A filesystem consumer must have direct (/ “full”) network to the OSDs.