Transportation systems move freight and they move people. The complexity of systems cannot be underestimated, and the interactions and coordination amongst countless systems is essential to safe, efficient and timely operation. One compromised system can have a cascading effect on other systems in order to protect lives and prevent damage to capital intensive equipment. Since many systems are geographically separated, visibility into the operational aspects of these systems is crucial. The networks that enable communication for safety, control and telemetry all benefit from monitoring since unusual or unauthorized activities need quick action given lives are often at stake.