Episode 42: Public vs. Private Addressing — What You’re Allowed to Use

This episode explains the difference between public and private IP addresses and why the distinction is important for both exam and real-world environments. Public addresses are globally routable and assigned by regional registries, while private ranges, defined by RFC 1918, are reserved for internal use. The discussion highlights the specific private ranges for Class A, Class B, and Class C networks, which you must memorize for the exam.Practical applications are then covered, such as how organizations use private addressing internally with Network Address Translation (NAT) to access the Internet. Examples include enterprise LANs using 10.0.0.0/8 or small offices configured with 192.168.0.0/16. Troubleshooting considerations, such as conflicts caused by overlapping private ranges in mergers or VPNs, are also discussed. Understanding these distinctions equips you to interpret exam questions and apply proper design in real environments. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your certification path.

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