ANS-C01 sample questions

Question 1

A company uses a 4 Gbps AWS Direct Connect dedicated connection with a link aggregation group (LAG) bundle to connect to five VPCs that are deployed in the us-east-1 Region. Each VPC serves a different business unit and uses its own private VIF for connectivity to the on-premises environment. Users are reporting slowness when they access resources that are hosted on AWS.A network engineer finds that there are sudden increases in throughput and that the Direct Connect connection becomes saturated at the same time for about an hour each business day. The company wants to know which business unit is causing the sudden increase in throughput. The network engineer must find out this information and implement a solution to resolve the problem.Which solution will meet these requirements?

Accepted Answer

Review the Amazon CloudWatch metrics for VirtualInterfaceBpsEgress and VirtualInterfaceBpsIngress to determine which VIF is sending the highest throughput during the period in which slowness is observed. Create a new 10 Gbps dedicated connection. Shift traffic from the existing dedicated connection to the new dedicated connection.

Answer

Review the Amazon CloudWatch metrics for VirtualInterfaceBpsEgress and VirtualInterfaceBpsIngress to determine which VIF is sending the highest throughput during the period in which slowness is observed. Upgrade the bandwidth of the existing dedicated connection to 10 Gbps.

Answer

Review the Amazon CloudWatch metrics for ConnectionBpsIngress and ConnectionPpsEgress to determine which VIF is sending the highest throughput during the period in which slowness is observed. Upgrade the existing dedicated connection to a 5 Gbps hosted connection.

Answer

Review the Amazon CloudWatch metrics for ConnectionBpsIngress and ConnectionPpsEgress to determine which VIF is sending the highest throughput during the period in which slowness is observed. Create a new 10 Gbps dedicated connection. Shift traffic from the existing dedicated connection to the new dedicated connection.

Question 2

A software-as-a-service (SaaS) provider hosts its solution on Amazon EC2 instances within a VPC in the AWS Cloud. All of the provider's customers also have their environments in the AWS Cloud.A recent design meeting revealed that the customers have IP address overlap with the provider's AWS deployment. The customers have stated that they will not share their internal IP addresses and that they do not want to connect to the provider's SaaS service over the internet.Which combination of steps is part of a solution that meets these requirements? (Choose two.)

Accepted Answer

Deploy the SaaS service endpoint behind a Network Load Balancer.

Accepted Answer

Configure an endpoint service, and grant the customers permission to create a connection to the endpoint service.

Answer

Deploy the SaaS service endpoint behind an Application Load Balancer.

Answer

Configure a VPC peering connection to the customer VPCs. Route traffic through NAT gateways.

Answer

Deploy an AWS Transit Gateway, and connect the SaaS VPC to it. Share the transit gateway with the customers. Configure routing on the transit gateway.

Question 3

A network engineer is designing the architecture for a healthcare company's workload that is moving to the AWS Cloud. All data to and from the on-premises environment must be encrypted in transit. All traffic also must be inspected in the cloud before the traffic is allowed to leave the cloud and travel to the on-premises environment or to the internet.The company will expose components of the workload to the internet so that patients can reserve appointments. The architecture must secure these components and protect them against DDoS attacks. The architecture also must provide protection against financial liability for services that scale out during a DDoS event.Which combination of steps should the network engineer take to meet all these requirements for the workload? (Choose three.)

Accepted Answer

Use AWS Direct Connect with MACsec support for connectivity to the cloud.

Accepted Answer

Use Gateway Load Balancers to insert third-party firewalls for inline traffic inspection.

Accepted Answer

Configure AWS Shield Advanced and ensure that it is configured on all public assets.

Answer

Use Traffic Mirroring to copy all traffic to a fleet of traffic capture appliances.

Answer

Set up AWS WAF on all network components.

Answer

Configure an AWS Lambda function to create Deny rules in security groups to block malicious IP addresses.

Question 4

A retail company is running its service on AWS. The company’s architecture includes Application Load Balancers (ALBs) in public subnets. The ALB target groups are configured to send traffic to backend Amazon EC2 instances in private subnets. These backend EC2 instances can call externally hosted services over the internet by using a NAT gateway.The company has noticed in its billing that NAT gateway usage has increased significantly. A network engineer needs to find out the source of this increased usage.Which options can the network engineer use to investigate the traffic through the NAT gateway? (Choose two.)

Accepted Answer

Enable VPC flow logs on the NAT gateway's elastic network interface. Publish the logs to a log group in Amazon CloudWatch Logs. Use CloudWatch Logs Insights to query and analyze the logs.

Accepted Answer

Enable VPC flow logs on the NAT gateway's elastic network interface. Publish the logs to an Amazon S3 bucket. Create a custom table for the S3 bucket in Amazon Athena to describe the log structure. Use Athena to query and analyze the logs.

Answer

Enable NAT gateway access logs. Publish the logs to a log group in Amazon CloudWatch Logs. Use CloudWatch Logs Insights to query and analyze the logs.

Answer

Configure Traffic Mirroring on the NAT gateway's elastic network interface. Send the traffic to an additional EC2 instance. Use tools such as tcpdump and Wireshark to query and analyze the mirrored traffic.

Answer

Enable NAT gateway access logs. Publish the logs to an Amazon S3 bucket. Create a custom table for the S3 bucket in Amazon Athena to describe the log structure. Use Athena to query and analyze the logs.

Question 5

A banking company is successfully operating its public mobile banking stack on AWS. The mobile banking stack is deployed in a VPC that includes private subnets and public subnets. The company is using IPv4 networking and has not deployed or supported IPv6 in the environment. The company has decided to adopt a third-party service provider's API and must integrate the API with the existing environment. The service provider’s API requires the use of IPv6.A network engineer must turn on IPv6 connectivity for the existing workload that is deployed in a private subnet. The company does not want to permit IPv6 traffic from the public internet and mandates that the company's servers must initiate all IPv6 connectivity. The network engineer turns on IPv6 in the VPC and in the private subnets.Which solution will meet these requirements?

Accepted Answer

Add a route to the existing subnet route tables to point IPv6 traffic to the NAT gateway.

Accepted Answer

Add a route to the existing subnet route tables to point IPv6 traffic to the NAT instance.

Accepted Answer

Create an egress-only Internet gateway in the VPAdd a route to the existing subnet route tables to point IPv6 traffic to the egress-only internet gateway.

Accepted Answer

Configure a security group that denies all inbound traffic. Associate the security group with the egress-only internet gateway.

Answer

Create an internet gateway and a NAT gateway in the VP

Answer

Create an internet gateway and a NAT instance in the VP

Answer

Create an egress-only internet gateway in the VP

Question 6

A company has deployed an AWS Network Firewall firewall into a VPC. A network engineer needs to implement a solution to deliver Network Firewall flow logs to the company’s Amazon OpenSearch Service (Amazon Elasticsearch Service) cluster in the shortest possible time.Which solution will meet these requirements?

Accepted Answer

Create an Amazon Kinesis Data Firehose delivery stream that includes the Amazon OpenSearch Service (Amazon Elasticsearch Service) cluster as the destination. Configure flow logs for the firewall Set the Kinesis Data Firehose delivery stream as the destination for the Network Firewall flow logs.

Answer

A network engineer needs to implement a solution to deliver Network Firewall flow logs to the company’s Amazon OpenSearch Service (Amazon Elasticsearch Service) cluster in the shortest possible time.Which solution will meet these requirements?

Answer

Create an Amazon S3 bucket. Create an AWS Lambda function to load logs into the Amazon OpenSearch Service (Amazon Elasticsearch Service) cluster. Enable Amazon Simple Notification Service (Amazon SNS) notifications on the S3 bucket to invoke the Lambda function. Configure flow logs for the firewall. Set the S3 bucket as the destination.

Answer

Configure flow logs for the firewall. Set the Amazon OpenSearch Service (Amazon Elasticsearch Service) cluster as the destination for the Network Firewall flow logs.

Answer

Create an Amazon Kinesis data stream that includes the Amazon OpenSearch Service (Amazon Elasticsearch Service) cluster as the destination. Configure flow logs for the firewall. Set the Kinesis data stream as the destination for the Network Firewall flow logs.

Question 7

A multinational financial corporation is designing a high-frequency trading platform on AWS. The architecture requires a multicast-enabled network to distribute market data feeds to hundreds of subscriber EC2 instances across multiple Availability Zones in the us-east-1 Region. The source of the multicast stream is an on-premises feed connected via AWS Direct Connect. The solution must support IGMPv3 and minimize administrative overhead. Which architecture meets these requirements?

Accepted Answer

Use AWS Transit Gateway with a multicast domain. Create a Transit Gateway Connect attachment over the Direct Connect transport attachment. Add the VPC subnets and the Connect attachment to the multicast domain association. Configure IGMPv3 on the instances.

Answer

Deploy a transit VPC with third-party virtual routers running PIM-SM to encapsulate multicast traffic in GRE tunnels between the on-premises source and the subscriber VPCs.

Answer

Configure an AWS Transit Gateway with a multicast domain. Associate the VPC subnets containing the subscriber instances and the Direct Connect Gateway attachment with the multicast domain. Configure the on-premises router to send multicast traffic to the Transit Gateway.

Answer

Implement a mesh of VPC peering connections. Enable the 'Multicast Support' flag on the peering connections and configure static multicast routes in the VPC route tables.

Question 8

A network engineer is troubleshooting a connectivity issue between an EC2 instance in a private subnet and an Amazon S3 bucket. The VPC has a Gateway VPC Endpoint for S3 configured. The route table associated with the subnet has a route to the Gateway Endpoint (pl-xxxxxxxx). However, the application on the EC2 instance times out when attempting to download an object. The Network ACLs allow all traffic. Which of the following is the MOST likely cause of the issue?

Accepted Answer

The EC2 instance's security group outbound rules do not allow traffic to the S3 prefix list on port 443.

Answer

The Gateway Endpoint policy explicitly denies access to the specific S3 bucket.

Answer

The S3 bucket is in a different region than the VPC, and Gateway Endpoints are regional.

Answer

The S3 bucket policy requires requests to come from the public IP of the NAT Gateway.

ANS-C01 Sample Questions & Answers

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ANS-C01 Sample Questions & Answers

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