Some systems require specialized architectural models due to their operational roles, legacy constraints, or real-time performance needs. In this episode, we examine security implications for environments such as Internet of Things (IoT) networks, industrial control systems (ICS), SCADA platforms, and embedded systems that power everything from medical devices to smart thermostats. These environments often include devices with limited update capabilities, hardcoded credentials, or minimal support for encryption, making traditional security tools less effective. We explore how segmenting these networks, enforcing strict access controls, and using passive monitoring can help detect threats without disrupting operations. We also address the unique risks of real-time operating systems (RTOS), where availability and timing are as critical as confidentiality. Securing specialized systems requires balancing protection with performance—and recognizing that some legacy environments demand containment, not overhaul.