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In the current work, with a view on network resilience, we investigate gains which result from utilization of the flexible elastic optical networks (EONs). We also focus on an important capability of the EON, viz. the squeezed protection which, in cases of failure(s), minimizes the need for resource(s). We conduct in-depth simulations considering realistic (1) assumptions and (2) topologies, which are characterized by different node(s) numbers, link distances, and corresponding realistic traffic matrices. Through simulations, for the various protection schemes, we compare the fixed-grid wavelength-switched optical networks (WSONs) and the EONs, and the obtained simulation results demonstrate that EONs significantly outperform WSONs. Also, for the considered performance metrics, viz. CapEx/OpEx, power consumption, and spectrum utilization, the WSONs are observed to require more amounts of resources compared …