Although this setting increases available subnet address pools within the VPC, expanding EC2 instance types does not replenish exhausted private addresses; this concerns sustainable IP address allocation for expanding workloads, not the specified stable routing across overlapping address spaces.

The proposed action validates that the actual subnet consults the expected route table; a correct route in an unassociated table has no effect on the workload, supporting accurate identification of routing changes during maintenance but leaving stable routing across overlapping address spaces unmet.

This approach reduces advertised route entries while preserving intended reachability; careless summary routes can blackhole destinations not actually reachable, which helps with constrained route-table growth under scaling instead of delivering stable routing across overlapping address spaces.

Although this setting records firewall match and flow observations for investigation, ordinary VPC flow records lack the full inspection-rule match context; this concerns explainable stateful policy decisions, not the specified centrally enforced traffic inspection.

The proposed action keeps both directions of the flow through the stateful inspection path; rules cannot track a return flow they never observe, supporting stateful firewall session continuity but leaving centrally enforced traffic inspection unmet.

This approach inspects supported session traffic against the configured stateful domain policy; DNS-only blocking is less comprehensive than network-path filtering for some application flows, which helps with egress enforcement based on inspected traffic attributes instead of delivering centrally enforced traffic inspection.

This approach delivers flow metadata to log groups that support filters and analytics; logging to an S3 bucket alone will not create CloudWatch Logs filter events, which helps with flow-data integration with CloudWatch log analysis instead of delivering reachability evidence at flow-record granularity.

This alternative scopes IP-flow metadata collection to one ENI; capturing VPC-wide traffic would include many unrelated interfaces, so it addresses targeted interface-level network investigation rather than the required reachability evidence at flow-record granularity.

Although this setting stores flow-log records in an object store suitable for later analysis, CloudWatch alarms can analyze metrics but are not an object-archive delivery substitute; this concerns durable searchable flow records in S3, not the specified reachability evidence at flow-record granularity.

The proposed action records selected flow metadata for supported network interfaces across the VPC; a subnet-only log would miss interfaces outside the chosen subnet, supporting broad IP-flow visibility over changing workloads but leaving reachability evidence at flow-record granularity unmet.

Although this setting supplies global segment governance beyond manually peered transit gateways, Cloud WAN migration still requires explicit attachment planning and route-domain design; this concerns scalable centrally policy-controlled multi-Region transit, not the specified return-path routing through the regional TGW peer.

The proposed action forwards the destination CIDR toward the peer transit gateway; TGW peering does not propagate remote VPC prefixes automatically, supporting local transit routing to a peered Region but leaving return-path routing through the regional TGW peer unmet.

This alternative completes the cross-gateway attachment approval workflow; adding routes cannot activate an unaccepted connection, so it addresses an active regional transit peer attachment rather than the required return-path routing through the regional TGW peer.

This approach limits initiations leaving resources attached to the group; broad 0.0.0.0/0 egress would let instances bypass the intended proxy, which helps with least-privilege EC2 outbound connection control instead of delivering completed bidirectional TCP sessions through a subnet ACL.

Although this setting evaluates stateless subnet ingress and egress rules in number order, security groups allow approved traffic but do not contain explicit deny rules; this concerns CIDR-specific subnet boundary rejection, not the specified completed bidirectional TCP sessions through a subnet ACL.

The proposed action permits return packets of established allowed flows under stateful evaluation; NACLs remain stateless and need appropriate rules in both directions, supporting automatic response permission for established EC2 flows but leaving completed bidirectional TCP sessions through a subnet ACL unmet.

Although this setting selects the table evaluated when traffic arrives from that attachment, route propagation and table association are different controls; this concerns correct ingress routing domain for the attachment, not the specified packet forwarding from a workload VPC to TGW and shared-services destination discovery across permitted transit segments.

This approach rejects matches rather than forwarding them to an attachment; destination longest-prefix matching still determines which route applies, which helps with explicit dropped traffic for disallowed prefixes instead of delivering packet forwarding from a workload VPC to TGW and shared-services destination discovery across permitted transit segments.

Although this setting keeps flow routing aligned to the same attachment AZ for stateful appliances, appliance mode does not automatically insert a firewall into a route path; this concerns symmetric inspection attachment routing by flow, not the specified packet forwarding from a workload VPC to TGW and shared-services destination discovery across permitted transit segments.

This alternative separates network packet observations from API-event provenance; neither source alone records both packet bytes and who changed infrastructure, so it addresses correlated data-plane and control-plane security investigations rather than the required selective traffic capture for targeted investigation.

Although this setting controls which traffic directions are forwarded to the mirror target, an ingress-only filter misses responses originating from the workload; this concerns complete request and response packet evidence, not the specified selective traffic capture for targeted investigation.

The proposed action copies packet data from supported interfaces to a chosen analysis destination; VPC Flow Logs cannot reconstruct application payload content, supporting packet-level incident reconstruction but leaving selective traffic capture for targeted investigation unmet.

This approach distributes encapsulated packets to healthy inline inspection instances; an HTTP ALB would proxy application requests rather than transparently steer packets, which helps with elastic third-party firewall processing instead of delivering correct stateful session inspection across the appliance fleet.

This alternative attaches private traffic-insertion endpoints to GWLB-backed inspection capacity; conventional PrivateLink interface endpoints are not transparent GWLB route targets, so it addresses private shared-appliance service insertion rather than the required correct stateful session inspection across the appliance fleet.

Although this setting determines whether GWLB continues forwarding to an inspection target, merely scaling instance count will not fix health checks pointing to the wrong port; this concerns healthy-appliance registration for transparent inspection, not the specified correct stateful session inspection across the appliance fleet.

The proposed action avoids direct inbound and outbound public paths through the subnet routing design; a public IP association alone does not override an absent internet gateway route, supporting isolated workload network placement but leaving enforced cross-VPC inspection and segmentation unmet.

This approach limits transitive reachability according to the entering attachment's routing domain; all-spoke propagation into one table would expose paths not needed by developers, which helps with environment-isolated shared-network transit instead of delivering enforced cross-VPC inspection and segmentation.

Although this setting narrows private connectivity to specific approved services, peering makes a broader routed network available subject to downstream controls; this concerns service-only isolation between provider and consumer, not the specified enforced cross-VPC inspection and segmentation.

The proposed action stores standardized network-flow metadata beyond individual workload accounts; ad hoc per-instance logging cannot provide consistent coverage, supporting centralized multi-account traffic retention but leaving scalable investigation across multiple network log sources unmet.

This approach protects stored audit evidence against premature or unauthorized removal; encryption at rest does not itself prohibit deletion of encrypted log objects, which helps with policy-enforced log archive immutability instead of delivering scalable investigation across multiple network log sources.

This alternative delivers selected viewer-request fields with low latency to consumers; traditional access-log delivery is not a low-latency event stream, so it addresses timely CDN security request evidence rather than the required scalable investigation across multiple network log sources.

Although this setting uses the implicit VPC-connected route for directly connected CIDRs, traffic should not ordinarily detour through a NAT gateway for VPC-local addresses; this concerns internal routing between subnets in the same VPC, not the specified private-instance outbound internet connectivity and private S3 access without an internet NAT path and private service API access from a VPC.

This alternative provides the gateway next hop for public internet routes; public addressing and security rules are also required for the connection to succeed, so it addresses internet reachability for public-addressed EC2 instances rather than the required private-instance outbound internet connectivity and private S3 access without an internet NAT path and private service API access from a VPC.