1. A computer implemented method, comprising: determining, using a computer model of a network, a minimum probability of failure path between a pair of network nodes at a first network layer for one or more pairs of network nodes; calculating, using a processor and stored network data, a value for the minimum probability of failure for the identified minimum probability of failure path between the pair of network nodes at the first network layer for the one or more pairs of network nodes; identifying, using a processor, a maximum of the determined minimum probability of failure values for the one or more pairs of network nodes for the first network layer; determining, using the computer model of a network, a minimum probability of failure path between a pair of network nodes at one or more secondary network layers for one or more pairs of network nodes; calculating, using a processor and stored network data, a value for the minimum probability of failure for the identified minimum probability of failure path at the one or more secondary network layers; identifying, using a processor, a maximum of the determined minimum probability of failures for each of the one or more secondary network layers; and outputting, via a user interface, one or more maximum of the determined minimum probability of failure values for one or more network layers for one or more pairs of network nodes of the modeled network.