Week 1 – Discussion – ICS Architecture
https://www.youtube.com/watch?v=sCd–Tsj4sM (Links to an external site.) 
After watching the “Industrial Control System (ICS) and SCADA: Risks and Solutions” video above, answer the following each in a separate paragraph:
- What is a PLC? ( Programmable Logic Controller )
- What is a DCS? ( Distributed Control System )
- What is a SIS? ( Safety Instrumented System )
- Why is the HMI important? ( Human Machine Interface )
- Why is having the IT network and the ICS network as one?
