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Exam ANS-C00 topic 1 question 167 discussion

Exam question from Amazon's ANS-C00
Question #: 167
Topic #: 1
[All ANS-C00 Questions]

You are a holdings company that buys many businesses and must integrate their VPCs into your network. You are constantly encountering networks with similar or overlapping subnets.
What is the best way to manage this.

  • A. BFD
  • B. VRF
  • C. A standby router for the overlapping subnets.
  • D. A strict IP addressing policy that forces new companies to change the IP addresses of their VPCs.
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️
VRF, or Virtual Routing and Forwarding will allow you to have multiple routing tables on your router.

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eeghai7thioyaiR4
Highly Voted 3 years, 10 months ago
Ans: B VRF are network virtualization, you can have multiple virtual router on a single physical device, each with a separate routing table etc Why not IPv6, tho :)
upvoted 6 times
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arhelp
Most Recent 1 year, 8 months ago
Keep in mind this is an AWS exam not a Cisco exam. AWS doesn't have a concept of VRF. per AWS documentation: https://aws.amazon.com/blogs/networking-and-content-delivery/connecting-networks-with-overlapping-ip-ranges/ From this link we can clearly see that the answer is D in AWS own words.
upvoted 1 times
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Algoproxy
2 years, 10 months ago
Agree with SunnyAU. B could solve the issue but it is reoccuring. D seems like a better option
upvoted 1 times
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SunnyAU
3 years, 2 months ago
A: Not relevant. BFD is for failure detection B: VRFs. Possibly. The overlapping networks can certainly existing as segmented (in VRFs) networks but sooner or later your systems will need to communicate with the aquired VPCs that have overlapping IPs. How would that work? You would have to use NAT. If its VPC to VPC, perhaps using Private link. C: Not sure how a standby router will help here. D: Re-numbering new VPCs that are over-lapping seems to be the best/first option for me. D seems like the best option to me.
upvoted 1 times
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sapien45
3 years, 5 months ago
If IP overlapping or duplication is a concern when connecting to multiple VPC .... call VRF B
upvoted 1 times
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