This illustration includes four boxes:

--A box containing icons labelled full-tier node, Block Volume, and Boot Volume. At the bottom of the box are icons labelled Compartment 1 and VCN 1.

--A box containing icons labelled ELK stack, Block Volume, and Boot Volume. At the bottom of the box are icons labelled Compartment 2 and VCN 2.

--A box containing icons labelled PeopleSoft Windows Client, Block Volume, and Boot Volume. At the bottom of the box are icons labelled Compartment 3 and VCN 3.

--A box containing icons labelled DBS and ADB-D. At the bottom of the box are icons labelled Compartment 4 and VCN 4.

There is a dotted line connecting the four VCNs labelled VCN Peering.