Episode 18 — Authentication Protocols: 802.1X, RADIUS, TACACS+, LDAP in scenarios
Authentication protocols are frequently referenced in CloudNetX scenarios as indicators of where and how access decisions are made, and this episode establishes clear mental models for the most common ones. It defines 802.1X as a port-based network access control mechanism, RADIUS as a centralized authentication and accounting protocol for network access, TACACS+ as a protocol focused on device administration with granular command control, and LDAP as a directory access mechanism that underpins many identity systems. The first paragraph focuses on understanding each protocol’s role rather than its syntax, emphasizing how protocol choice reflects access scope, enforcement point, and operational intent.
