  Research on the robustness of the Internet has gained critical importance in
the last decades because more and more individuals, societies and firms rely on
this global network infrastructure for communication, knowledge transfer,
business processes and e-commerce. In particular, modeling the structure of
Internet has inspired several novel graph metrics for assessing important
topological robustness features of large complex networks such as the Internet.
This survey provides a comparative overview of these metrics, presents their
strengths and limitations for analyzing the robustness of the Internet
topology, and outlines a conceptual tool set in order to facilitate future
analysis and adoption in research and practice.
