  Quantum networks will enable the implementation of communication tasks with
qualitative advantages with respect to the communication networks we know
today. While it is expected that the first demonstrations of small scale
quantum networks will take place in the near term, many challenges remain to
scale them. To compare different solutions, optimize over parameter space and
inform experiments, it is necessary to evaluate the performance of concrete
quantum network scenarios. Here, we review the state of the art of tools for
evaluating the performance of quantum networks. We present them from three
different angles: information-theoretic benchmarks, analytical tools, and
simulation.
