The proposed action makes return packets follow the intended private hybrid route; NAT internet egress cannot substitute for a routable customer network attachment, supporting correct workload-side return path to on premises but leaving withdrawal of invalid customer routes unmet.

This approach lists reachability explicitly when dynamic routing is not used; dynamic BGP route learning would require a compatible customer gateway and VPN configuration, which helps with static hybrid prefix coverage instead of delivering withdrawal of invalid customer routes.

This alternative aligns hybrid routing tables with the changed workload address plan; changing only AWS-side routes leaves on-premises devices unaware of the migration, so it addresses end-to-end reachability after VPC renumbering rather than the required withdrawal of invalid customer routes.

Although this setting exposes specific AWS service destinations without opening general egress, an internet gateway with permissive routes would create a broader network path; this concerns service-specific private outbound connectivity, not the specified controlled internet egress from multiple VPCs and resilient zonal outbound IPv4 access.

The proposed action makes proxy policy the approved path for application web requests; a NAT gateway translates addresses but cannot enforce enterprise proxy authentication, supporting authenticated policy-enforced web egress but leaving controlled internet egress from multiple VPCs and resilient zonal outbound IPv4 access unmet.

This alternative uses resolver domain controls and a routed firewall for separate egress risks; blocking DNS alone may be bypassed by clients using direct IP destinations or other resolvers, so it addresses layered outbound destination restriction rather than the required controlled internet egress from multiple VPCs and resilient zonal outbound IPv4 access.

This approach removes common failure dependencies from hybrid physical connectivity; multiplying logical VIFs on one router does not fix that router's failure domain, which helps with physically independent Direct Connect resilience instead of delivering resilience against a Direct Connect location outage.

Although this setting allows eligible equal-cost routes to share traffic over supported attachments, per-flow distribution is not the same as packet-by-packet balancing; this concerns bandwidth sharing among equivalent hybrid paths, not the specified resilience against a Direct Connect location outage.

The proposed action aggregates compatible dedicated connections at the Ethernet link layer; member compatibility and location requirements still apply to the aggregate, supporting LAG-based capacity and operational grouping but leaving resilience against a Direct Connect location outage unmet.

This approach evaluates abnormal inspection signals against justified thresholds; storing raw logs without a metric and alarm does not produce an immediate notification, which helps with timely notice of traffic-filtering anomalies instead of delivering detectable policy-enforced DNS blocks.

This alternative groups traffic metadata by addresses, ports, action and time; CloudTrail event history lacks the packet-level connection counts needed here, so it addresses quantitative analysis of suspicious network flows rather than the required detectable policy-enforced DNS blocks.

Although this setting compares traffic volume trends with policy enforcement evidence, one graph of aggregate bytes cannot show whether suspicious flows were denied; this concerns multi-source explanation for network exfiltration indicators, not the specified detectable policy-enforced DNS blocks.

This alternative emits traffic inspection and alert information from firewall processing; VPC Flow Logs cannot expose the complete rule context of a stateful firewall, so it addresses visibility into inspected flow decisions rather than the required baseline throughput and latency during healthy operations.

The proposed action tracks traffic and drop behavior at the gateway service; DNS query logs cannot measure packet loss at a transit attachment, supporting quantitative transit-path troubleshooting but leaving baseline throughput and latency during healthy operations unmet.

This approach reports AWS-side tunnel condition over time for alerting; an ELB target-health metric tracks application targets rather than IPsec tunnels, which helps with evidence of VPN tunnel reliability instead of delivering baseline throughput and latency during healthy operations.

The proposed action transports GRE overlay traffic and exchanges routes over BGP with compatible appliances; a simple VPC attachment alone does not establish GRE Connect peers, supporting native transit attachment for SD-WAN overlays but leaving routed integration of SD-WAN appliances unmet.

This approach adds IP-layer encryption and peer authentication across the intervening network; GRE alone provides encapsulation without confidentiality, which helps with encrypted overlay communications instead of delivering routed integration of SD-WAN appliances.

Although this setting wraps IP traffic inside GRE for overlay forwarding, IPsec provides cryptographic protections but is not the same as a plain GRE transport; this concerns protocol encapsulation for an overlay tunnel, not the specified routed integration of SD-WAN appliances.

The proposed action provides source-translated outbound IPv4 access for private workloads; a route to an internet gateway alone does not make a private-addressed instance publicly reachable, supporting outbound-only IPv4 internet access for private instances but leaving zonal fault isolation for regional workloads unmet.

This approach permits initiated outbound IPv6 flows while blocking new internet-originated flows; ordinary NAT gateways are chiefly an IPv4 translation pattern, which helps with outbound-only IPv6 connectivity instead of delivering zonal fault isolation for regional workloads.

This alternative provides more allocatable IP addresses for new workload interfaces; increasing desired capacity without available addresses cannot place instances, so it addresses available subnet addressing for scale-out rather than the required zonal fault isolation for regional workloads.

This alternative 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, so it addresses isolated workload network placement rather than the required service-only isolation between provider and consumer.

The proposed action steers inter-VPC traffic through approved inspection before delivery; security groups on each workload do not provide central packet inspection visibility, supporting enforced cross-VPC inspection and segmentation but leaving service-only isolation between provider and consumer 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 service-only isolation between provider and consumer.

This alternative constrains control-plane authority over shared network resources; subnet participation does not imply permission to rewrite central routes, so it addresses least-privilege tenant administration in shared networks rather than the required service-only isolation between provider and consumer.

This approach prevents accepting an encrypted connection to an impersonating server; encryption without peer identity validation remains vulnerable to man-in-the-middle attacks, which helps with authenticated outbound HTTPS service communication instead of delivering confidentiality within private east-west service traffic.

This alternative installs renewed certificates in the software that actually terminates TLS; attaching an ACM certificate to an unrelated ALB does not update Nginx on the instance, so it addresses maintained TLS identity on customer-managed application servers rather than the required confidentiality within private east-west service traffic.

Although this setting protects client-to-database data in transit using the service's TLS protocol, encrypted EBS volumes do not encrypt network packets in flight; this concerns encrypted managed-database application connections, not the specified confidentiality within private east-west service traffic.

Custom Flow Logs fields can enrich metadata, including packet address or rejection information, but still do not contain complete Ethernet frames or TCP payload bytes for inspection.

CloudTrail records AWS API activity and selected data-plane service operations, not a full packet capture from an EC2 network interface. It cannot reconstruct the requested TCP sequence.

DNS query logs show name lookup details, not traffic exchanged on an existing TCP connection. They do not expose TCP SYN flags, retransmissions or application payloads.

The proposed action verifies signed DNS data when the chain of trust is valid but sends client resolver queries in cleartext; DNSSEC does not encrypt transport and cannot conceal queried hostnames, supporting DNS data integrity without query confidentiality but leaving private DNS query content in transit unmet.

This approach respects differences between private DNS scope and public authoritative signing; assuming identical DNSSEC hosting features for all private zones can produce an unsupported configuration, which helps with correctly scoped DNS integrity controls instead of delivering private DNS query content in transit.

This alternative authenticates the origin and integrity of supported DNS records for validating resolvers; DNSSEC signs data but does not encrypt the DNS question or response contents, so it addresses DNSSEC-authenticated public DNS answers rather than the required private DNS query content in transit.