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Creating a rule on a shared outbound endpoint does not cause every VPC to use it automatically. The reported evidence instead concerns Route 53 Resolver endpoint HA requires multiple endpoint IP addresses in appropriate Availability Zones: a single DNS endpoint address can become an availability bottleneck and may violate service requirements.

Inbound and outbound endpoint directions describe where queries enter or leave the VPC DNS service. The reported evidence instead concerns Route 53 Resolver endpoint HA requires multiple endpoint IP addresses in appropriate Availability Zones: a single DNS endpoint address can become an availability bottleneck and may violate service requirements.

A single rule cannot simultaneously express different target destinations for the same suffix without planning. For the stated conditions, a single DNS endpoint address can become an availability bottleneck and may violate service requirements. The more specific mechanism is Route 53 Resolver endpoint HA requires multiple endpoint IP addresses in appropriate Availability Zones.

Five-tuple flow hashing may send different source ports to different endpoints, unlike source-IP affinity. The reported evidence instead concerns global Accelerator endpoint weights influence distribution among endpoints inside an endpoint group: endpoint weights divide traffic within a Region's group rather than controlling traffic sent to entire Regions.

Edge delivery reduces round-trip and origin load for reusable media segments compared with direct distant origin calls. For the stated conditions, endpoint weights divide traffic within a Region's group rather than controlling traffic sent to entire Regions. The more specific mechanism is global Accelerator endpoint weights influence distribution among endpoints inside an endpoint group.

TLS hostname validation and distribution hostname configuration are both required for secure vanity-domain delivery. That property alone cannot account for the reported symptom; endpoint weights divide traffic within a Region's group rather than controlling traffic sent to entire Regions.

Network-flow metadata can indicate volume and routing context without revealing encrypted payload contents. For the stated conditions, lack of a log record is not definitive proof of absence of every packet event. The more specific mechanism is flow Logs have collection, delivery and best-effort visibility limitations and are not exhaustive packet capture.

Application load-balancer logging carries different context from subnet-level network-flow telemetry. For the stated conditions, lack of a log record is not definitive proof of absence of every packet event. The more specific mechanism is flow Logs have collection, delivery and best-effort visibility limitations and are not exhaustive packet capture.

Traffic logs cannot identify the API principal responsible for a policy change by themselves. The reported evidence instead concerns flow Logs have collection, delivery and best-effort visibility limitations and are not exhaustive packet capture: lack of a log record is not definitive proof of absence of every packet event.

A log disposition identifies a blocked flow but not the precise rule or network layer responsible. That adjustment does not address the controlling condition: connectivity intent tests can expose policy blockers before business transactions fail. Verify required source-destination paths retain expected reachability after the controlled change.

Large outliers may have little effect on the mean but violate strict tail-latency service goals. That adjustment does not address the controlling condition: connectivity intent tests can expose policy blockers before business transactions fail. Verify required source-destination paths retain expected reachability after the controlled change.

Default flow formats may omit the extra context needed to distinguish transport behavior. In this situation, connectivity intent tests can expose policy blockers before business transactions fail. The proposed change does not ensure required source-destination paths retain expected reachability after the controlled change.

Keeping outbound traffic in the same AZ can reduce cross-zone forwarding and improve failure isolation. That property alone cannot account for the reported symptom; EC2 scaling cannot allocate ENIs when the chosen subnets have no free addresses.

Enhanced networking reduces virtualization overhead when the instance and driver support the feature. That property alone cannot account for the reported symptom; EC2 scaling cannot allocate ENIs when the chosen subnets have no free addresses.

Target discovery must follow workload life cycle to avoid forwarding to stopped or obsolete tasks. The reported evidence instead concerns subnet available IP address capacity constrains the launch of network interfaces for new instances: EC2 scaling cannot allocate ENIs when the chosen subnets have no free addresses.

Compatible but obsolete cryptography may violate security policy despite forming a technically valid tunnel. The reported evidence instead concerns ALB HTTPS listener security policies determine supported TLS protocol and cipher combinations: certificate validity does not itself prevent negotiation of legacy TLS versions or cipher suites.

Secure viewer-to-edge traffic does not protect origin traffic when the origin connection remains cleartext. The decisive technical distinction is ALB HTTPS listener security policies determine supported TLS protocol and cipher combinations; certificate validity does not itself prevent negotiation of legacy TLS versions or cipher suites.

Packet authorization is a separate security property from confidentiality and peer authentication. That property alone cannot account for the reported symptom; certificate validity does not itself prevent negotiation of legacy TLS versions or cipher suites.

VPC Flow Logs cannot reconstruct full TCP handshake packet order from aggregated records. That adjustment does not address the controlling condition: permitted packets can still fail at TLS identity verification before application data is exchanged. Verify the HTTPS client validates the intended hostname without needing a route change.

The packet is blocked before the HTTP service can evaluate credentials or cookies. In this situation, permitted packets can still fail at TLS identity verification before application data is exchanged. The proposed change does not ensure the HTTPS client validates the intended hostname without needing a route change.

The hub's internal route selection can differ from VPC subnet routes and needs separate evaluation. The needed control instead targets reachability Analyzer tests network configuration, not the certificate trust chain used by an application; it succeeds when the HTTPS client validates the intended hostname without needing a route change.

A redundant hybrid design must address circuit, location and device failure domains independently. The needed control instead targets hybrid failover depends on routing advertisements and route selection across Direct Connect and VPN paths; it succeeds when after the primary circuit fails, return traffic and outbound traffic converge through the backup VPN.

BGP routes do not increase the actual physical capacity of an undersized circuit. That adjustment does not address the controlling condition: a backup tunnel's presence does not guarantee traffic will switch unless routing reacts appropriately. Verify after the primary circuit fails, return traffic and outbound traffic converge through the backup VPN.

Dedicated connectivity avoids relying exclusively on public internet paths but does not inherently encrypt payloads. It does not directly achieve the required result: after the primary circuit fails, return traffic and outbound traffic converge through the backup VPN. The constraint is that a backup tunnel's presence does not guarantee traffic will switch unless routing reacts appropriately.

A technically signed certificate is not trusted unless the verifier has the appropriate CA chain. The needed control instead targets iKE pre-shared key authentication fails when the VPN peers do not use the same secret; it succeeds when the IKE security association establishes after synchronized credential rotation.

A stale DS pointer can invalidate an otherwise correctly served new signing key. In this situation, a tunnel's encryption algorithm can remain supported while authentication fails because keys differ. The proposed change does not ensure the IKE security association establishes after synchronized credential rotation.

Certificate import does not grant ACM authority to renew material issued by an external CA. It does not directly achieve the required result: the IKE security association establishes after synchronized credential rotation. The constraint is that a tunnel's encryption algorithm can remain supported while authentication fails because keys differ.

Query logging reveals requested names and resolver behavior rather than full application HTTP transactions. The needed control instead targets ALB access logs include load-balancer and target status codes for request diagnosis; it succeeds when logs expose the relevant 502 events and whether the target returned a response.

Flow-log aggregates are not equivalent to packet captures and omit individual packet payloads. The needed control instead targets ALB access logs include load-balancer and target status codes for request diagnosis; it succeeds when logs expose the relevant 502 events and whether the target returned a response.

A log disposition identifies a blocked flow but not the precise rule or network layer responsible. It does not directly achieve the required result: logs expose the relevant 502 events and whether the target returned a response. The constraint is that the load balancer's status can differ from the response produced or not produced by a backend target.

A BGP route to a network does not grant permission through intermediate stateful firewalls. That adjustment does not address the controlling condition: gateway attachments are route targets; incorrect associations can blackhole return flows despite healthy tunnels. Verify packet path analysis shows traffic returning through the intended hybrid gateway.

A healthy VPN tunnel does not automatically install every required prefix into every TGW routing domain. It does not directly achieve the required result: packet path analysis shows traffic returning through the intended hybrid gateway. The constraint is that gateway attachments are route targets; incorrect associations can blackhole return flows despite healthy tunnels.

A generic default advertisement cannot replace required more-specific route intent in every hybrid design. The needed control instead targets the TGW routing table must select the VPN or Direct Connect attachment for the on-premises destination; it succeeds when packet path analysis shows traffic returning through the intended hybrid gateway.