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The ANS-C01 Certification Exam is intended for professionals who have experience in networking and AWS environments. Candidates should have a deep understanding of networking concepts and protocols, as well as hands-on experience with AWS networking services. They should also be familiar with AWS security and compliance requirements and have experience designing and deploying scalable, highly available, and fault-tolerant network architectures.

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Amazon ANS-C01 Exam, also known as the AWS Certified Advanced Networking Specialty Exam, is a certification exam offered by Amazon Web Services (AWS). ANS-C01 exam is designed for IT professionals who have a deep understanding of networking concepts and hands-on experience in designing and implementing network solutions on AWS. ANS-C01 Exam Tests candidates on their ability to design, deploy, and manage secure and scalable networking solutions on the AWS platform.

Amazon AWS Certified Advanced Networking Specialty Exam Sample Questions (Q194-Q199):

NEW QUESTION # 194
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?

A. Enable DNS64 for the new EC2 instance. Create a new egress-only internet gateway that supports IPv6.
B. Enable DNS64 for the IPv6-only subnets. Update the route tables for the IPv6-only subnets to send traffic through the NAT gateway.
C. Enable NAT64 for each route table. Create a new NAT gateway that supports both IPv4 and IPv6.
D. Enable NAT64 for the testing VPC. Reconfigure the existing NAT gateway to support IPv6.

Answer: B

Explanation:
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.

NEW QUESTION # 195
An international company wants to implement a multi-site hybrid infrastructure. The company wants to deploy its cloud computing resources on AWS in the us-east-1 Region and in the eu-west-2 Region, and in on- premises data centers in the United States (US) and in the United Kingdom (UK). The data centers are connected to each other by a private WAN connection. IP routing information is exchanged dynamically through BGP. The company wants to have two AWS Direct Connect connections, one each in the US and the UK.
The company expects to have 15 VPCs in each Region with CIDR blocks that do not overlap with each other or with CIDR blocks of the on-premises environment. The VPC CIDR blocks are planned so that the prefix aggregation can be performed both on a Regional level and across the entire AWS environment. The company will deploy a transit gateway in each Region to connect the VPCs. A network engineer plans to use a Direct Connect gateway in each Region. A transit VIF will attach the Direct Connect gateway in each Region to the transit gateway in that Region. The transit gateways will be peered with each other.
The network engineer wants to ensure that traffic follows the shortest geographical path from source to destination. Traffic between the on-premises data centers and AWS must travel across a local Direct Connect connection. Traffic between the US data center and eu-west-2 and traffic between the UK data center and us- east-1 must use the private WAN connection to reach the Direct Connect connection to the appropriate Region when the Direct Connect connection is available. The network must be resilient to failures in either the private WAN connection or with the Direct Connect connections. The network also must reroute traffic automatically in the event of any failure.
How should the network engineer configure the transit VIF associations on the Direct Connect gateways to meet these requirements?

A. Advertise VPC-specific CIDR prefixes from only the local Region. Additionally, advertise the aggregate route for the company's entire AWS environment.
B. Advertise only the aggregate route for the company's entire AWS environment.
C. Advertise all the specific VPC CIDR blocks from both Regions.
D. Advertise both Regional aggregate prefixes. Configure custom BGP communities on the routes advertised toward the data center.

Answer: A

NEW QUESTION # 196
A company hosts its IT infrastructure in an on-premises data center. The company wants to migrate the infrastructure to the AWS Cloud in phases. A network engineer wants to set up a 10 Gbps AWS Direct Connect dedicated connection between the on-premises data center and VPCs. The company's network provider needs 3 months to provision the Direct Connect connection.
In the meantime, the network engineer implements a temporary solution by deploying an AWS Site-to-Site VPN connection that terminates to a virtual private gateway. The network engineer observes that the bandwidth of the Site-to-Site VPN connection is capped at 1.25 Gbps despite a powerful customer gateway device.
What should the network engineer do to improve the VPN connection bandwidth before the implementation of the Direct Connect connection?

A. Discuss the issue with the hardware vendor. Buy a bigger and more powerful customer gateway device that has faster encryption and decryption capabilities.
B. Create several additional Site-to-Site VPN connections that terminate on the same virtual gateway.
Configure equal-cost multi-path (ECMP) routing to use all the VPN connections simultaneously.
C. Contact AWS Support to request a bandwidth quota increase for the existing Site-to-Site VPN connection.
D. Create a transit gateway. Attach the VPCs to the transit gateway. Create several additional Site-to-Site VPN connections that terminate on the transit gateway. Configure equal-cost multi-path (ECMP) routing to use all the VPN connections simultaneously.

Answer: B

NEW QUESTION # 197
Imagine you are using AWS Direct Connect with just one connection from your router to the AWS Direct Connect router. If your connection becomes unavailable, the communication with AWS cloud is lost.
What is the best method to prevent this from happening?
Response:

A. AWS Direct Connect neither provides BGP nor provides the failover.
B. AWS Direct Connect recommends that you request and configure two dedicated connections to AWS either using BGP Multipath (Active/Active) connection or the failover (Active/Passive) connection.
C. AWS Direct connect does not have a provision to prevent the situation but when you design the system, it is recommended to request a back-up instance to which the traffic can be re-routed.
D. AWS Direct Connect recommends to have the same configuration set up in a multi AZ zone to prevent such loss in connections.

Answer: B

NEW QUESTION # 198
A company has an AWS environment that includes multiple VPCs that are connected by a transit gateway.
The company has decided to use AWS Site-to-Site VPN to establish connectivity between its on-premises network and its AWS environment.
The company does not have a static public IP address for its on-premises network. A network engineer must implement a solution to initiate the VPN connection on the AWSside of the connection for traffic from the AWS environment to the on-premises network.
Which combination of steps should the network engineer take to establish VPN connectivity between the transit gateway and the on-premises network? (Choose three.)

A. Use a public certificate authority (CA) from AWS Private Certificate Authority to create a certificate.
B. Create a customer gateway. Specify the current dynamic IP address of the customer gateway device's external interface.
C. Create a customer gateway without specifying the IP address of the customer gateway device.
D. Configure the Site-to-Site VPN tunnel options to use Internet Key Exchange version 1 (IKEv1).
E. Use a private certificate authority (CA) from AWS Private Certificate Authority to create a certificate.
F. Configure the Site-to-Site VPN tunnel options to use Internet Key Exchange version 2 (IKEv2).

Answer: A,E,F

NEW QUESTION # 199
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