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Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 139 discussion

Exam question from Amazon's AWS Certified Advanced Networking - Specialty ANS-C01
Question #: 139
Topic #: 1
[All AWS Certified Advanced Networking - Specialty ANS-C01 Questions]

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 AWS side 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. Configure the Site-to-Site VPN tunnel options to use Internet Key Exchange version 1 (IKEv1).
  • B. Configure the Site-to-Site VPN tunnel options to use Internet Key Exchange version 2 (IKEv2).
  • C. Use a private certificate authority (CA) from AWS Private Certificate Authority to create a certificate.
  • D. Use a public certificate authority (CA) from AWS Private Certificate Authority to create a certificate.
  • E. Create a customer gateway. Specify the current dynamic IP address of the customer gateway device’s external interface.
  • F. Create a customer gateway without specifying the IP address of the customer gateway device.
Show Suggested Answer Hide Answer
Suggested Answer: BCF 🗳️
by Pratap at June 9, 2023, 2:53 p.m.
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Neo00
Highly Voted 2 years, 1 month ago
For people who said F is wrong, please read this 'An IP address is not required when you are using a private certificate from AWS Private Certificate Authority.' https://docs.aws.amazon.com/vpn/latest/s2svpn/cgw-options.html
upvoted 12 times
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AJ7428
Highly Voted 2 years, 2 months ago
Selected Answer: BCF
BCF is the right answer.
upvoted 10 times
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Nouwara
Most Recent 3 months, 2 weeks ago
Selected Answer: BCF
F. Create a customer gateway without specifying the IP This is only allowed when using certificate-based VPNs. You do not specify a static IP when using AWS-initiated VPNs, as the customer gateway has a dynamic public IP.
upvoted 1 times
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Spaurito
9 months, 2 weeks ago
Option D doesn't makes sense. Once it changes, it is no longer valid for the configuration.
upvoted 1 times
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Spaurito
9 months, 2 weeks ago
BCF - If your customer gateway IP address is dynamic, then leave the IP Address field empty. If your customer gateway IP address is static, then you can choose to leave this field empty, or specify the IP address.
upvoted 1 times
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YogiB1
1 year, 2 months ago
Selected Answer: ACF
ACF --> https://repost.aws/knowledge-center/vpn-certificate-based-site-to-site
upvoted 1 times
YogiB1
1 year, 2 months ago
BCF I meant
upvoted 1 times
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acloudguru
1 year, 3 months ago
Selected Answer: BCE
E is correct based on Amazon Q's answer
upvoted 2 times
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mrt261
1 year, 5 months ago
Selected Answer: BCF
An IP address is not required when you are using a private certificate from AWS Private Certificate Authority and a public VPN. https://docs.aws.amazon.com/vpn/latest/s2svpn/cgw-options.html
upvoted 1 times
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vikasj1in
1 year, 6 months ago
Selected Answer: BCE
b) IKEv2 provides better security and flexibility compared to IKEv1, making it a preferred choice for VPN connections. c) Since the on-premises network does not have a static public IP address, using a private CA allows for the issuance of certificates for authentication without relying on public infrastructure. e) In this scenario, the customer gateway represents the on-premises VPN device. By specifying the current dynamic IP address of the customer gateway's external interface, AWS can establish the VPN connection even if the IP address changes dynamically.
upvoted 2 times
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Arad
1 year, 9 months ago
Selected Answer: BCF
BCF is the right answer.
upvoted 2 times
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luisfsm_111
1 year, 11 months ago
Selected Answer: BCF
It's BCF: https://docs.aws.amazon.com/vpn/latest/s2svpn/cgw-options.html#:~:text=(Optional)%20The%20IP,for%20more%20info.
upvoted 3 times
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MohamedSherif1
2 years ago
Selected Answer: BCF
An IP address is not required when you are using a private certificate from AWS Private Certificate Authority.
upvoted 4 times
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MohamedSherif1
2 years ago
Selected Answer: BCE
You can't create customer gateway without Specify the IP address
upvoted 1 times
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[Removed]
2 years, 1 month ago
Selected Answer: BCE
Option E eliminates the need to have a static IP, option F is incorrect because a static IP will be required which the company does not have. You must have a static IP address to use as the endpoint for the IPsec tunnels that connect your customer gateway device to AWS Site-to-Site VPN endpoints. If a firewall is in place between AWS and your customer gateway device, the rules in the following tables must be in place to establish the IPsec tunnels. The IP addresses for the AWS-side will be in the configuration file. https://docs.aws.amazon.com/vpn/latest/s2svpn/your-cgw.html
upvoted 1 times
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wartywarthog
2 years, 1 month ago
The IP address needs to be static, so E can't be a right answer.
upvoted 2 times
[Removed]
2 years, 1 month ago
The company does not have a static IP, so E is correct because it removed the need to have a static IP.
upvoted 2 times
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Balasmaniam
2 years, 2 months ago
https://docs.aws.amazon.com/vpn/latest/s2svpn/vpn-tunnel-authentication-options.html V BCF
upvoted 1 times
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RVD
2 years, 2 months ago
Selected Answer: BCF
An IP address is not required when you are using a private certificate from AWS Private Certificate Authority.
upvoted 4 times
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