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Amazon ANS-C01 Exam Questions
Free Amazon ANS-C01 Exam Actual Questions
Note: Premium Questions for ANS-C01 were last updated On Jun. 03, 2026 (see below)
A global company runs business applications in the us-east-1 Region inside a VPC. One of the company's regional offices in London uses a virtual private gateway for an AWS Site-to-Site VPN connection tom the VPC. The company has configured a transit gateway and has set up peering between the VPC and other VPCs that various departments in the company use.
Employees at the London office are experiencing latency issues when they connect to the business applications.
What should a network engineer do to reduce this latency?
Enabling acceleration for a Site-to-Site VPN connection uses AWS Global Accelerator to route traffic from the on-premises network to an AWS edge location that is closest to the customer gateway device1.AWS Global Accelerator optimizes the network path, using the congestion-free AWS global network to route traffic to the endpoint that provides the best application performance2.Setting the transit gateway as the target gateway enables connectivity between the on-premises network and multiple VPCs that are attached to the transit gateway3.
A company has a highly available application that is hosted in multiple VPCs and in two on-premises data centers. All the VPCs reside in the same AWS Region. All the VPCs require access to each other and to the on-premises data centers for the transfer of files that are multiple gigabytes in size.
A network engineer is designing an AWS Direct Connect solution to connect the on-premises data centers to each VPC.
Which architecture will meet the company's requirements with the LEAST operational overhead?
A company has multiple VPCs with subnets that use IPv4. Traffic from the VPCs to the internet uses a NAT gateway. The company wants to transition to IPv6.
A network engineer creates multiple IPv6-only subnets in an existing testing VPC. The network engineer deploys a new Amazon EC2 instance that has an IPv6 address into one of the subnets. During testing, the network engineer discovers that the new EC2 instance is not able to communicate with an IPv4-only service through the internet. The network engineer needs to enable the IPv6 EC2 instance to communicate with the IPv4-only service.
Which solution will meet this requirement?
Understanding the Issue: The IPv6-only EC2 instance cannot communicate with IPv4-only services because IPv6 and IPv4 are not directly compatible. To bridge this gap, DNS64 and NAT64 are used together. However, AWS NAT gateways do not natively support NAT64, but you can use DNS64 to translate IPv4 DNS records (A records) into IPv6-compatible addresses (AAAA records).
DNS64 for IPv6-Only Subnets: DNS64 is a service that synthesizes AAAA records for IPv4-only services. This allows IPv6-only clients to resolve IPv4 addresses as IPv6-compatible addresses, enabling communication through the NAT gateway.
NAT Gateway with Route Table Updates: The NAT gateway enables outbound communication from private subnets to the internet. Updating the route tables for IPv6-only subnets to send traffic through the NAT gateway ensures that the IPv6 EC2 instance can reach IPv4 services.
A company has its production VPC (VPC-A) in the eu-west-1 Region in Account 1. VPC-A is attached to a transit gateway (TGW-A) that is connected to an on-premises data center in Dublin, Ireland, by an AWS Direct Connect transit VIF that is configured for an AWS Direct Connect gateway. The company also has a staging VPC (VPC-B) that is attached to another transit gateway (TGW-B) in the eu-west-2 Region in Account 2.
A network engineer must implement connectivity between VPC-B and the on-premises data center in Dublin.
Which solutions will meet these requirements? (Choose two.)
B . Associate TGW-B with the Direct Connect gateway. Advertise the VPC-B CIDR block under the allowed prefixes. This will allow traffic from VPC-B to be sent over the Direct Connect connection to the on-premises data center via TGW-B. C. Configure another transit VIF on the Direct Connect connection and associate TGW-B. Advertise the VPC-B CIDR block under the allowed prefixes. This will enable the use of the Direct Connect connection for VPC-B's traffic by connecting TGW-B to the Direct Connect gateway.
A company runs applications in two VPCs that are in separate AWS Regions. One VPC is in the us-east-1 Region. The second VPC is in the us-west-1 Region. The company needs to establish connectivity between the two VPCs. The company also needs to connect the VPCs to applications that run in an on-premises data center.
The current traffic requirement between the VPCs is 50 per month. The company expects traffic volume between the VPCs to increase. The traffic requirement from the VPCs to the on-premises data center is 10 per month. The company expects the traffic between the VPCs and the data center to remain constant.
Which solution will meet these requirements MOST cost-effectively?
Traffic Volume Consideration: The traffic volume between the VPCs (50 TB per month and increasing) justifies the use of transit gateways, which are designed for scalable, high-throughput interconnectivity. A VPC peering connection would not scale as efficiently for this traffic volume.
On-Premises Connectivity: Establishing VPN connections from the on-premises firewall to the transit gateways ensures secure connectivity between the on-premises data center and both VPCs.
Transit Gateway Peering: Creating a peering connection between the transit gateways allows for efficient inter-Region communication between the VPCs without routing through the on-premises data center, reducing latency and costs.
Cost Efficiency: Transit gateway peering provides a cost-effective solution for large inter-Region traffic volumes compared to alternatives like routing all traffic through the on-premises data center, which would incur higher egress costs and potentially create a bottleneck.
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