Core-and-pod design is a computer network design that uses individual pods that hang off the core layer as modular units.
The routed core layer serves as a fast and simple way to connect many generations of pods to each other.
This design then resembles some kind of large and wide tree, with many "branches", or pods, off the main "trunk", or core.
[1] This new design differs from the original "three-tier" architecture through the fact that pods can be bundled as a unit.
The units can be manipulated as however the staff of the network pleases.