It covers virtual networks, routing, name resolution, gateways, load balancers, private links, internet edges, and network policy. Its scope is the cloud communication layer, not every part of cloud security.
Provider APIs and automation create and change cloud networks. Workloads may be short-lived, while traffic can remain inside provider infrastructure and bypass traditional perimeters. Sound design maps required flows to controlled paths and protects forwarding and management interfaces.
Key points
Architecture and policySeparate environments and trust zones, minimize public exposure, constrain ingress, egress, and east-west communication, and preserve policy when resources scale or move.
Control plane and responsibilityDocument which network layers the provider operates and which controls the customer configures. Apply least privilege to network administration and automation, protect credentials, review changes, and detect drift in routes, gateways, security rules, name services, and private connectivity.
Visibility and resilienceCollect suitable flow, DNS, firewall, load-balancer, and control-plane events; test asymmetric paths, service limits, dependency failure, denial-of-service protections, and recovery without retaining unnecessary content.
Important limitationA private address, virtual network, or provider backbone does not authenticate a workload or make its traffic safe. Cloud-native controls can have service, region, protocol, and logging gaps, while an unsafe route, identity permission, or automation change can bypass several intended boundaries at once.