4.3. Managing Networking Resources

💡 First Principle: Networking operations tasks are mostly about adjusting a network's shape after it's already live — resizing, adding routes, changing DNS/NAT behavior — without redesigning the whole topology from Phase 3, which means each of these is a targeted, incremental change rather than a from-scratch build.

⚠️ Common Misconception: Cloud NAT provides inbound connectivity to private instances. In reality, Cloud NAT provides outbound-only internet access for instances without external IPs; it does not accept unsolicited inbound connections from the internet.