Episode 47 — Map OSI and TCP/IP Models to Security Controls
The OSI and TCP/IP models organize communication, and the SSCP exam tests your ability to connect each layer to its security controls. We review the seven OSI layers—physical through application—and the four TCP/IP layers, showing how protections align: physical controls for cables and ports, data link protections like MAC filtering, network controls such as firewalls and routers, transport safeguards with TLS or IPSec, and application-layer defenses like input validation and session management. You’ll learn to map threats to layers, identify where countermeasures apply, and spot distractors that misplace controls in exam scenarios.
Practical reasoning solidifies understanding. Examples include mitigating ARP spoofing at layer two, preventing IP address spoofing and route injection at layer three, and securing web traffic at layer seven. We discuss how controls overlap, why redundancy strengthens security, and how evidence—logs, configurations, and traffic captures—proves correct placement. Troubleshooting highlights cover issues like asymmetric routing breaking stateful firewalls, misaligned inspection layers causing blind spots, and encryption hiding needed metadata for detection. By confidently mapping security measures to layers, you’ll answer network questions faster and evaluate architectures with precision in both testing and practice. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your educational path. Also, if you want to stay up to date with the latest news, visit DailyCyber.News for a newsletter you can use, and a daily podcast you can commute with.
