The document provides a quick overview of the eXpressive Internet Architecture (XIA). It discusses how the current internet architecture has become an obstacle to addressing challenges like built-in security and new usage models. XIA aims to keep what works in the current internet while exploring concepts like diverse endpoint types, intrinsic security, and flexible addressing to directly address key challenges. It presents examples of how these concepts work together and benefit applications. The document also mentions an open source XIA prototype and core networking team working to support applications and services on XIA.