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最新的 AWS Certified Specialty ANS-C01 免費考試真題 (Q120-Q125):

問題 #120
A media company is implementing a news website for a global audience. The website uses Amazon CloudFront as its content delivery network. The backend runs on Amazon EC2 Windows instances behind an Application Load Balancer (ALB). The instances are part of an Auto Scaling group. The company's customers access the website by using service example com as the CloudFront custom domain name. The CloudFront origin points to an ALB that uses service- alb.example.com as the domain name.
The company's security policy requires the traffic to be encrypted in transit at all times between the users and the backend.
Which combination of changes must the company make to meet this security requirement?
(Choose three.)

A. Create a certificate for service-alb.example.com by using AWS Certificate Manager (ACM). On the ALB add a new HTTPS listener that uses the new target group and the service- alb.example.com ACM certificate. Modify the CloudFront origin to use the HTTPS protocol only.
Delete the HTTP listener on the ALB.
B. Create a self-signed certificate for service-alb.example.com. Import the certificate into AWS Certificate Manager (ACM). On the ALB add a new HTTPS listener that uses the new target group and the imported service-alb.example.com ACM certificate. Modify the CloudFront origin to use the HTTPS protocol only. Delete the HTTP listener on the ALB.
C. Create a certificate for service.example.com by using AWS Certificate Manager (ACM). Configure CloudFront to use this custom SSL/TLS certificate. Change the default behavior to redirect HTTP to HTTPS.
D. Create a self-signed certificate for service.example.com. Import the certificate into AWS Certificate Manager (ACM). Configure CloudFront to use this imported SSL/TLS certificate.
Change the default behavior to redirect HTTP to HTTPS.
E. Create a certificate with any domain name by using AWS Certificate Manager (ACM) for the EC2 instances. Configure the backend to use this certificate for its HTTPS listener. Specify the instance target type during the creation of a new target group that uses the HTTPS protocol for its targets. Attach the existing Auto Scaling group to this new target group.
F. Create a public certificate from a third-party certificate provider with any domain name for the EC2 instances. Configure the backend to use this certificate for its HTTPS listener. Specify the instance target type during the creation of a new target group that uses the HTTPS protocol for its targets. Attach the existing Auto Scaling group to this new target group.

答案：A,C,F

解題說明：
ACM removes the time-consuming manual process of purchasing, uploading, and renewing SSL/TLS certificates.
https://aws.amazon.com/certificate-manager/
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/cnames-and-https- requirements.html
https://docs.aws.amazon.com/elasticloadbalancing/latest/application/create-https-listener.html You can configure one or more cache behaviors in your CloudFront distribution to require HTTPS for communication between viewers and CloudFront.
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/using-https-viewers-to- cloudfront.html Option C is wrong. You cannot associate ACM certificates with an EC2 instance that is not connected to a Nitro Enclave.
https://docs.aws.amazon.com/acm/latest/userguide/acm-services.html

問題 #121
An organization launched an IPv6-only web portal to support IPv6-native mobile clients. Front-end instances launch in an Amazon VPC associated with an appropriate IPv6 CIDR. The VPC IPv4 CIDR is fully utilized. A single subnet exists in each of two Availability Zones with appropriately configured IPv6 CIDR associations. Auto Scaling is properly configured, and no Elastic Load Balancing is used.
Customers say the service is unavailable during peak load times. The network engineer attempts to launch an instance manually and receives the following message: "There are not enough free addresses in subnet 'subnet-12345677' to satisfy the requested number of instances." What action will resolve the availability problem?

A. Resize the IPv6 CIDR on each of the existing subnets. Modify the Auto Scaling group maximum number of instances.
B. Create a new subnet using a VPC secondary IPv6 CIDR, and associate an IPv6 CIDR. Include the new subnet in the Auto Scaling group.
C. Add a secondary IPv4 CIDR to the Amazon VPC. Assign secondary IPv4 address space to each of the existing subnets.
D. Create a new subnet using a VPC secondary IPv4 CIDR, and associate an IPv6 CIDR. Include the new subnet in the Auto Scaling group.

答案：D

問題 #122
DNS name resolution must be provided for services in the following four zones:
company.private.
emea.company.private.
apac.company.private.
amer.company.private.
The contents of these zones is not considered sensitive, however, the zones only need to be used by services hosted in these VPCs, one per geographic region. Each VPC should resolve the names in all zones.
How can you use Amazon route 53 to meet these requirements?
Response:

A. Create a Route Public Hosted Zone for each of the four zones and configure the VPS DNS Resolver to forward
B. Create a single Route 53 Private Hosted Zone for the zone company.private and associate it with the three VPCs.
C. Create a Route 53 Private Hosted Zone for each of the four zones and associate them with the three VPCs.
D. Create a single Route 53 Public Hosted Zone for the zone company.private and configure the VPS DNS Resolver to forward

答案：C

問題 #123
A company is using custom DNS servers that run BIND for name resolution in its VPCs. The VPCs are deployed across multiple AWS accounts that are part of the same organization in AWS Organizations. All the VPCs are connected to a transit gateway. The BIND servers are running in a central VPC and are configured to forward all queries for an on-premises DNS domain to DNS servers that are hosted in an on-premises data center. To ensure that all the VPCs use the custom DNS servers, a network engineer has configured a VPC DHCP options set in all the VPCs that specifies the custom DNS servers to be used as domain name servers.
Multiple development teams in the company want to use Amazon Elastic File System (Amazon EFS). A development team has created a new EFS file system but cannot mount the file system to one of its Amazon EC2 instances. The network engineer discovers that the EC2 instance cannot resolve the IP address for the EFS mount point fs-33444567d.efs.us-east-
1.amazonaws.com. The network engineer needs to implement a solution so that development teams throughout the organization can mount EFS file systems.
Which combination of steps will meet these requirements? (Choose two.)

A. Create an Amazon Route 53 Resolver rule to forward queries for the on-premises domain to the on-premises DNS servers. Share the rule with the organization by using AWS Resource Access Manager (AWS RAM). Associate the rule with all the VPCs.
B. Configure the BIND DNS servers in the central VPC to forward queries for efs.us-east-
1.amazonaws.com to the Amazon provided DNS server (169.254.169.253).
C. Create an Amazon Route 53 Resolver inbound endpoint in the central VPUpdate all the VPC DHCP options sets to use the Route 53 Resolver inbound endpoint in the central VPC for name resolution.
D. Create an Amazon Route 53 private hosted zone for the efs.us-east-1.amazonaws.com domain.Associate the private hosted zone with the VPC where the EC2 instance is deployed. Create an A record for fs-33444567d.efs.us-east-1.amazonaws.com in the private hosted zone. Configure the A record to return the mount target of the EFS mount point.
E. Create an Amazon Route 53 Resolver outbound endpoint in the central VPC. Update all the VPC DHCP options sets to use AmazonProvidedDNS for name resolution.

答案：A,E

解題說明：
https://aws.amazon.com/blogs/security/simplify-dns-management-in-a-multiaccount-environment- with-route-53-resolver/ You can mount an Amazon EFS file system on an Amazon EC2 instance using DNS names. The file system DNS name automatically resolves to the mount target's IP address in the Availability Zone of the connecting Amazon EC2 instance. To be able to do that, the VPC must use the default DNS provided by Amazon to resolve EFS DNS names.
If you plan to use EFS in your environment, I recommend that you resolve EFS DNS names locally and avoid sending these queries to central DNS because clients in that case would not receive answers optimized for their availability zone, which might result in higher operation latencies and less durability.

問題 #124
An organization is migrating its on-premises applications to AWS by using a ift-and-shift approach, taking advantage of managed AWS services wherever possible. The company must be able to edit the application code during the migration phase.
One application is a traditional three-tier application, consisting of a web presentation tier, an application tier, and a database tier. The external calling client applications need their sessions to remain sticky to both the web and application nodes that they initially connect to.
Which load balancing solution would allow the web and application tiers to scale horizontally independent from one another other?
Response:

A. Use an Application Load Balancer at both the web and application tiers, setting sessions stickiness at the target group level for both tiers
B. Deploy a web node and an application node as separate containers on the same host, using task linking to create a relationship between the pair. Add an Application Load Balancer with session stickiness in front of all web node containers.
C. Use a Network Load Balancer at the web tier, and an Application Load Balancer at the application tier.
Enable session stickiness on the Application Load Balancer, but take advantage of the native WebSockets protocols available to the Network Load Balancer.
D. Use an Application Load Balancer at the web tier and a Classic Load Balancer at the application tier.
Set session stickiness on both, but update the application code to create an application- controlled cookie on the Classic Load Balancer

答案：D

問題 #125
......

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有效的新版ANS-C01題庫＆保證Amazon ANS-C01考試成功與權威的ANS-C01測試

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