This document discusses how to build a resilient network through various methods like hardware redundancy, microsegmentation, and configuration backups. It introduces Westermo and defines network resiliency. It describes using hardware redundancy through layer 2 protocols like FRNT rings and layer 3 protocols like OSPF. Microsegmentation is achieved through a hybrid L2/L3 network with firewalls separating different network zones. The importance of configuration backups for maintaining control of network assets is also covered.