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Path patterns can route requests to distinct caching policies while sharing a distribution. The decisive technical distinction is CloudFront cache policies can disable caching while still providing edge proxy features; a zero-TTL caching configuration forwards origin requests rather than reusing old personalized data.

A private S3 origin prevents viewers bypassing edge controls through an unrestricted bucket endpoint. The decisive technical distinction is CloudFront cache policies can disable caching while still providing edge proxy features; a zero-TTL caching configuration forwards origin requests rather than reusing old personalized data.

Viewer-request transformations are distinct from long-running application logic executed at the origin. The reported evidence instead concerns CloudFront cache policies can disable caching while still providing edge proxy features: a zero-TTL caching configuration forwards origin requests rather than reusing old personalized data.

Unidirectional route configuration can lead to failed return traffic even when peering is active. That adjustment does not address the controlling condition: aZ placement of attachment subnets affects how traffic from workloads can use the transit hub. Verify test traffic from the relevant AZs follows the expected TGW attachment path.

Connectivity is driven by policy evaluation, not merely existence of a physical or logical attachment. In this situation, aZ placement of attachment subnets affects how traffic from workloads can use the transit hub. The proposed change does not ensure test traffic from the relevant AZs follows the expected TGW attachment path.

Central transit routing must apply least-privilege route visibility, not automatic full connectivity. It does not directly achieve the required result: test traffic from the relevant AZs follows the expected TGW attachment path. The constraint is that aZ placement of attachment subnets affects how traffic from workloads can use the transit hub.

Resource ownership and spoke VPC ownership can remain separate while attachments are governed centrally. The needed control instead targets Transit Gateway appliance mode can preserve flow affinity through a VPC attachment used for stateful inspection; it succeeds when bidirectional traffic is consistently processed by the intended appliance during testing.

A route propagated into one TGW table may be invisible to another attachment using a different table. In this situation, stateful middleboxes require both directions of a connection to traverse compatible inspection state. The proposed change does not ensure bidirectional traffic is consistently processed by the intended appliance during testing.

Connecting attachments to the same Transit Gateway does not by itself permit every attachment to reach every other. That adjustment does not address the controlling condition: stateful middleboxes require both directions of a connection to traverse compatible inspection state. Verify bidirectional traffic is consistently processed by the intended appliance during testing.

TLS hostname validation and distribution hostname configuration are both required for secure vanity-domain delivery. That property alone cannot account for the reported symptom; a private S3 origin prevents viewers bypassing edge controls through an unrestricted bucket endpoint.

A zero-TTL caching configuration forwards origin requests rather than reusing old personalized data. The reported evidence instead concerns origin access control limits direct S3 access while authorizing the specific CloudFront distribution: a private S3 origin prevents viewers bypassing edge controls through an unrestricted bucket endpoint.

Viewer-request transformations are distinct from long-running application logic executed at the origin. The decisive technical distinction is origin access control limits direct S3 access while authorizing the specific CloudFront distribution; a private S3 origin prevents viewers bypassing edge controls through an unrestricted bucket endpoint.

A provider-side creation is not the same as AWS customer authorization for a hosted service. For the stated conditions, gateway ownership remains separate; neither account should silently attach the other's resource. The more specific mechanism is cross-account Direct Connect gateway to TGW association requires an owner proposal and acceptance workflow.

Gateway attachments are route targets; incorrect associations can blackhole return flows despite healthy tunnels. The decisive technical distinction is cross-account Direct Connect gateway to TGW association requires an owner proposal and acceptance workflow; gateway ownership remains separate; neither account should silently attach the other's resource.

Overbroad BGP originations can redirect corporate traffic beyond intended AWS destinations. That property alone cannot account for the reported symptom; gateway ownership remains separate; neither account should silently attach the other's resource.

Publishing a private hosted zone alone does not expose its records to every VPC in an organization. It does not directly achieve the required result: validating resolvers confirm signed answers and reject deliberately corrupted signed data. The constraint is that signing a hosted zone alone does not establish validation if the parent delegation lacks the needed DS chain.

A DNS apex cannot use an ordinary CNAME together with required apex records, but AWS alias records support supported targets. In this situation, signing a hosted zone alone does not establish validation if the parent delegation lacks the needed DS chain. The proposed change does not ensure validating resolvers confirm signed answers and reject deliberately corrupted signed data.

Inbound endpoint existence does not grant resolution of private zones absent from its resolver view. That adjustment does not address the controlling condition: signing a hosted zone alone does not establish validation if the parent delegation lacks the needed DS chain. Verify validating resolvers confirm signed answers and reject deliberately corrupted signed data.

Network peer authentication cannot independently prove that a particular HTTPS hostname is the intended app server. In this situation, an origin secured by TLS does not protect the client-to-edge leg if HTTP remains allowed. The proposed change does not ensure sensitive content is inaccessible over plaintext HTTP and delivered through HTTPS.

HTTPS transport encryption does not establish server identity when its certificate is invalid or expired. It does not directly achieve the required result: sensitive content is inaccessible over plaintext HTTP and delivered through HTTPS. The constraint is that an origin secured by TLS does not protect the client-to-edge leg if HTTP remains allowed.

End-to-end confidentiality requires securing both client-to-ALB and ALB-to-target legs when policy demands. The needed control instead targets CloudFront viewer protocol policies can redirect or require HTTPS for viewer requests; it succeeds when sensitive content is inaccessible over plaintext HTTP and delivered through HTTPS.

Internal scheme and security-group rules jointly prevent direct public listener exposure. In this situation, a layer-seven ALB cannot be substituted for a workload whose transport is UDP datagrams. The proposed change does not ensure client UDP packets reach the intended backend endpoint with the expected packet delivery characteristics.

GWLB is designed for appliance insertion rather than content-based ALB routing or general TCP endpoints alone. The needed control instead targets network Load Balancers support UDP or TCP layer-four traffic forwarding for eligible target groups; it succeeds when client UDP packets reach the intended backend endpoint with the expected packet delivery characteristics.

A fixed response is produced by the load balancer and does not depend on backend target availability. That adjustment does not address the controlling condition: a layer-seven ALB cannot be substituted for a workload whose transport is UDP datagrams. Verify client UDP packets reach the intended backend endpoint with the expected packet delivery characteristics.

The source identity visible to a target can differ based on transport and load-balancing configuration. That property alone cannot account for the reported symptom; probes sent to a closed backend port mark targets unhealthy even when the service listens elsewhere.

Deregistering a target can allow in-flight work to finish rather than immediately interrupting every request. The decisive technical distinction is target-group health checks have a configurable probe port independent of the listener's public port; probes sent to a closed backend port mark targets unhealthy even when the service listens elsewhere.

Path-aware routing happens at HTTP layer seven before traffic is forwarded to a selected target. For the stated conditions, probes sent to a closed backend port mark targets unhealthy even when the service listens elsewhere. The more specific mechanism is target-group health checks have a configurable probe port independent of the listener's public port.

Gateway attachments are route targets; incorrect associations can blackhole return flows despite healthy tunnels. The reported evidence instead concerns site-to-Site VPN route selection depends on learned prefixes and policy matching the actual destination: a generic default advertisement cannot replace required more-specific route intent in every hybrid design.

Overbroad BGP originations can redirect corporate traffic beyond intended AWS destinations. The decisive technical distinction is site-to-Site VPN route selection depends on learned prefixes and policy matching the actual destination; a generic default advertisement cannot replace required more-specific route intent in every hybrid design.

A healthy VPN tunnel does not automatically install every required prefix into every TGW routing domain. The reported evidence instead concerns site-to-Site VPN route selection depends on learned prefixes and policy matching the actual destination: a generic default advertisement cannot replace required more-specific route intent in every hybrid design.

Signing a hosted zone alone does not establish validation if the parent delegation lacks the needed DS chain. The needed control instead targets Route 53 alias records can point an apex name at supported AWS resources where a CNAME is not allowed; it succeeds when the apex hostname resolves to the target load balancer address without a CNAME apex conflict.

Inbound endpoint existence does not grant resolution of private zones absent from its resolver view. The needed control instead targets Route 53 alias records can point an apex name at supported AWS resources where a CNAME is not allowed; it succeeds when the apex hostname resolves to the target load balancer address without a CNAME apex conflict.

Inbound endpoints bring permitted DNS queries into the VPC resolver, unlike outbound endpoints sending them out. That adjustment does not address the controlling condition: a DNS apex cannot use an ordinary CNAME together with required apex records, but AWS alias records support supported targets. Verify the apex hostname resolves to the target load balancer address without a CNAME apex conflict.