First, make sure every layer has a clear purpose – the outer layer should slow or divert the attacker, the middle layer should detect and isolate, and the inner layer must be resilient enough to keep core functions alive. Use redundancy so if one guard is breached, another still holds. Keep communication tight between layers; a coordinated response is only as strong as the weakest link. Test each layer under simulated attacks, learn from failures, and never underestimate the power of simple, disciplined design. That’s the key to standing strong together.