What Lies Beneath: Understanding Internet Congestion

Developing measurement tools that can concurrently monitor congested Internet links at a large scale would significantly help one understand how the Internet operates. While congestion at the Internet edge typically arises due to bottlenecks existent at a connection's last mile, congestion in the core could be more complex. This is because it may depend upon internal network policies and hence can reveal systematic problems such as routing pathologies, poorly-engineered network policies, or non-cooperative inter-AS relationships. Therefore, enabling the tools to provide deeper insights about congestion in the core is certainly beneficial.