view at the entire stress-strain response of the RSN, we can differentiate between four distinct responses, shown in Fig. \[fig:StressStrain\](a). There are two brittle responses, brittle (B) and quasibrittle (QB), that can be distinguished by the (slight) softening that occurs before macroscopic failure in the QB case. There are also two ductile responses (D1 and D2) that both show a clear plateau in the stress-strain response after softening. In case of D1, macroscopic failure occurs within this plateau. For D2, a second increase in the stress precedes final failure. These same four responses are also found in the MS model (see Supplemental Material [@supp]).

By contrast, at the microscopic level the failure behaviour of the RSN is distinct from the MS model. In Fig. \[fig:StressStrain\](b-e), we plot the broken bonds of the sacrificial network color-coded according to the strain at which they break. We clearly observe that the number of broken sacrificial bonds increases from B to D2 type of fracture. In B, all broken bonds are part of a single crack at the location where macroscopic failure occurs. A similar pattern is observed for QB, where however more bonds fail homogeneously throughout the sample before the final crack appears. 