Appendix A

Answers to the “Do I Know This Already” Questions

Chapter 1

1. c and e. Explanation: Constraints and mindset are the only two network design fundamentals listed. Security and scalability are both network design principles. The six network design fundamentals are mindset, design use cases, the business, constraints, requirements, and “why?”

2. a, c, and d. Explanation: Perimeter security, Zero Trust Architecture, and session-and transaction-based security are the security models that the industry has been shifting between over the last 20-plus years. Cybersecurity is not a security model but a component within these three models.

3. c. Explanation: Modularity allows for purpose-built building blocks to be leveraged. Failure isolation ...

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