See the IPv4 and IPv6 AS Core in 2020 for details of our latest AS Core 2020 visualization, and download a poster of the latest AS Core visualization. AS Core 2020 data source and analysis AS Core 2020 Poster About the AS Core visualizations Data Source CAIDA's AS Core visualization represents a macroscopic snapshot of IPv4 and IPv6 Internet topology samples captured over the course of a year. The
![CAIDA : research : topology : as_core_network](https://cdn-ak-scissors.b.st-hatena.com/image/square/4bf7c758e3022919ac59a782f58a1adf3360fff5/height=288;version=1;width=512/https%3A%2F%2Fwww.caida.org%2Fprojects%2Fas-core%2Fpics%2Fcaida-card-ascore.png)