Episode 66: GRE and IPsec — Tunneling and Secure Transport

This episode introduces two important tunneling and transport technologies: Generic Routing Encapsulation (GRE) and Internet Protocol Security (IPsec). GRE provides a simple way to encapsulate packets within other packets, allowing them to traverse incompatible networks. IPsec, in contrast, secures communications by encrypting and authenticating traffic, often used in VPN implementations. The exam requires you to know how these technologies differ and when each is applied.

Examples include using GRE to tunnel routing protocols between sites that otherwise lack direct connectivity and using IPsec to secure sensitive data transmitted across public networks. Troubleshooting considerations include mismatched encryption settings, incorrect key management, or unsupported encapsulation configurations. By mastering GRE and IPsec, you’ll be equipped to recognize tunneling and security solutions on the exam and deploy them effectively in real-world networks. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your certification path.