Exam GICSP Topic 1 Question 6 Discussion

Network Address Translation (NAT) is a technique used to hide private IP addresses behind a public IP address (C), providing security benefits by masking internal network structures from external networks. NAT also conserves public IP addresses and allows multiple devices to share a single IP when accessing external networks.
While NAT affects routing and firewall operations, its primary purpose is not to maximize firewall functionality (A), simplify access lists (B), or enable routing (D), although it may indirectly impact these functions.
GICSP training stresses NAT as part of network security design, especially at the boundary between enterprise and ICS networks.
Reference:
GICSP Official Study Guide, Domain: ICS Security Architecture & Design
NIST SP 800-82 Rev 2, Section 5.5 (Network Architecture)
GICSP Training on Network Security Fundamentals