The term OT has been employed to demonstrate technological and functional differences between traditional IT systems and industry-standard control systems. OT includes use of computers for the purpose of monitoring or changing system's physical condition, including power generation and distribution control systems, railroad network control systems, manufacturing control systems, etc. OT network components namely include SCADA (Supervisory Control and Data Acquisition) systems, distributed control systems (DCS) and programmable logical controls (PLC).

Requirements for OT networks differ significantly from those for IT networks. While IT networks are required to provide high throughput and dynamic growth, OT networks must emphasize reliability, robustness, guaranteed maximum latency and minimum bandwidth. Data in OT networks are transmitted by means of relatively slow lines, employing time-tested technologies known for their high durability. MPLS/TP technology has become a new standard for OT networks in recent years, replacing the currently used TDM technologies. Its main benefits include full operator control over a deterministic setup of every OT-network connection, including the above-mentioned requirements and their monitoring.

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Ethernet over any Media

Data communications are known for the variety of their communication protocols and interfaces. Throughout the decades of their development, various interfaces have been created for data transmission, while all these interfaces are dependent on communication protocols and devices connected to them. With each such new interface the complexity of the network has increased, while its maintenance has been extremely demanding. When we need to provide a service, whether to the customer or internally within the organisation, each new type of a physical interface makes service provisioning more complicated and expensive. Ideally, we would have a single physical interface able to provide various services.

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SCADA Security

Traditionally, control systems are separated from secure networks, such as a corporate IT network and the Internet. As a result, their separation combined with physical and safety precautions could be deemed sufficient to ensure industrial control systems’ security. More and more companies with industrial control systems start to connect their OT networks with IT networks, thereby making OT networks more accessible to potential attackers.

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