What's changed: Created Professional Cloud Network Engineer Chapter 5 (Domain 5 "Operations": logging network components (VPN/Router/VPC SC/Cloud NGFW/Firewall Insights/VPC Flow Logs/Cloud DNS/Cloud NAT/NCC) with Google Cloud Observability, networking metrics monitoring, Application Load Balancer connection draining/traffic redirect, VPN/Interconnect/Cloud Router BGP troubleshooting, VPC Flow Logs/firewall logs/Packet Mirroring, Network Intelligence Center = Network Topology/Connectivity Tests/Performance Dashboard/Firewall Insights/Network Analyzer/Flow Analyzer).
5.2Network Intelligence Center
Understand monitoring/troubleshooting with Network Intelligence Center: Network Topology (visualize throughput and traffic flows), Connectivity Tests (diagnose route/firewall misconfigurations), Performance Dashboard (packet loss and latency: Google-wide/project-scoped), Firewall Insights (monitor/improve rules), Network Analyzer (auto-detect failures/suboptimal configs/utilization warnings), and Flow Analyzer (evaluate traffic via VPC Flow Logs).
Network Intelligence Center (NIC) gathers network visualization, diagnosis, and optimization tools in one place. Pick the right tool by symptom.
5.2.1Visualization and diagnosis
To see configuration and traffic as a map, use Network Topology (visualize throughput and flows). Diagnose "A can't reach B" without sending real packets using Connectivity Tests, pinpointing routes, firewall misconfigurations, NAT, and more. For performance, use the Performance Dashboard to inspect packet loss and latency, both Google-wide and project-scoped. Map "statically diagnose unreachability = Connectivity Tests" and "quantify slow/dropping = Performance Dashboard."
5.2.2Optimization and analysis
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