A Security Operations Centre (SOC) is a place or team where a network or system is monitored or defended.
They often employ a number of technologies, such as an IDS.
SaaS: Software as a Service
SaaS stands for Software as a Service.
Quite literally SaaS is a software product provided as a service. Quite often this means that it is some kind of web application managed by an organisation. This application may be served through a cloud service such as Amazon Web Services (AWS), Google Cloud or Microsoft Azure (other cloud services are available).
SCADA: Supervisory Control And Data Acquisition
SCADA stands for Supervisory Control And Data Acquisition and is a kind of Operational Technology (OT).
SIEM: Security Information and Event Management
SIEM stands for Security Information and Event Management. SIEM could be a product or service which manages information/data and the changes in that information/data (“events”).
A SIEM may be used by a SOC.
Security-by-Design
Security-by-design means ensuring that cyber-security is a key part of the system from the design and throughout the development and deployment of that system.
RTU: Remote Terminal Unit
RTU stands for Remote Terminal Unit which is an Operational Technology (OT) device. It is a similar device to a PLC, but is developed for specific purposes. RTUs can often be found as part of telemetry systems within industry.
Ransomware
Ransomware is a type of malware (computer virus) which encrypts data, and asks for a ransom in return for the decryption of that data.
PLC: Programmable Logic Controller
A Programmable Logic Controller (PLC) is a type of Operational Technology which essentially takes signals (e.g. from sensors or from a human command) and sends a signal (e.g. to an actuator such as a robotic arm or a manufacturing line). These devices are programmable for a variety of functions.