| class  | MacroscopicNetworkLayerImpl | Macroscopic physical Network (layer) that supports one or more modes and link segment types, where the modes are registered on the network (Infrastructure network) level | 
| class  | ServiceNetworkLayerImpl | A service network layer is built on top of a physical network (layer). | 
| class  | TopologicalLayerImpl | An transport layer that is of a topological nature, i.e., it has node, links, etc. | 
| class  | UntypedNetworkLayerImpl<V extends DirectedVertex,E extends DirectedEdge,S extends EdgeSegment> | Model free network layer consisting of containers for vertices, edges, and edge segments each of which can be typed separately. | 
| class  | UntypedPhysicalLayerImpl<N extends Node,L extends Link,LS extends LinkSegment> | Model free Network consisting of managed nodes, links, and link segments, each of which can be iterated over. |