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ANS-C01 · Question #146

ANS-C01 Question #146: Real Exam Question with Answer & Explanation

The correct answer is D: Add 10.0.32.0/20 to the allowed prefix list.. The VPC route to send to on-premises is sent by entering the allowed prefix value of DXGW. Since only one remaining frame is used for route information, it is necessary to aggregate two

Submitted by certguy· Mar 6, 2026<DOMAIN_LIST_NOT_PROVIDED>

Question

A network engineer is designing hybrid connectivity with AWS Direct Connect and AWS Transit Gateway. A transit gateway is attached to a Direct Connect gateway and 19 VPCs across different AWS accounts. Two new VPCs are being attached to the transit gateway. The IP address administrator has assigned 10.0.32.0/21 to the first VPC and 10.0.40.0/21 to the second VPC. The prefix list has one CIDR block remaining before the prefix list reaches the quota for the maximum number of entries. What should the network engineer do to advertise the routes from AWS to on premises to meet these requirements?

Options

  • AAdd 10.0.32.0/21 and 10.0.40.0/21 to both AWS managed prefix lists.
  • BAdd 10.0.32.0/21 and 10.0.40.0/21 to the allowed prefix list.
  • CAdd 10.0.32.0/20 to both AWS managed prefix lists.
  • DAdd 10.0.32.0/20 to the allowed prefix list.

Explanation

The VPC route to send to on-premises is sent by entering the allowed prefix value of DXGW. Since only one remaining frame is used for route information, it is necessary to aggregate two

Topics

#AWS Direct Connect#AWS Transit Gateway#CIDR summarization#Prefix list management

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