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 -