Connectivity Framework 5: Connectivity Transport Layer
5.2 TYPICAL CONSIDERATIONS
5.2.1 NETWORK LAYER CONSIDERATIONS
5.2.1.1 TOPOLOGY
A transport may require or preclude a specific network topology. Network topologies in IIoT systems include:
• point-to-point,
• hub-and-spoke,
• meshed,
• hierarchical and
• a combination of the above.
Connectivity gateways can be used to bridge multiple networks and topologies, and to form more complex topologies, as needed.
For IIoT systems, a transport should not restrict the network topology.
5.2.1.2 SPAN
A transport communication path may span across different physical geographies. A logical transport layer can span the local area networks( LAN), large geographic distances( wide area networks i. e. WAN), or somewhere in between( metropolitan area networks i. e. MAN).
For IIoT systems, it is desirable for a transport to support a variety of network spans, including, LAN, MAN, WAN, and possibly space networks.
5.2.1.3 SEGMENTATION
IIoT systems need a way to separate data from different functional domains over the same network.
The transport may provide the ability to segment a network, to isolate different functional domains and one set of data exchanges from another.
For IIoT systems, it is highly desirable that the connectivity transport be able to support multiple independent and isolated communication paths between the same network endpoints.
IIC: PUB: G5: V1.0: PB: 20170228- 41-