Exam AWS Certified Solutions Architect - Professional topic 1 question 350 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional

Question #: 350
Topic #: 1

[All AWS Certified Solutions Architect - Professional Questions]

A user has created a VPC with public and private subnets using the VPC Wizard. The VPC has CIDR 20.0.0.0/16. The private subnet uses CIDR 20.0.0.0/24.
Which of the below mentioned entries are required in the main route table to allow the instances in VPC to communicate with each other?

A. Destination : 20.0.0.0/0 and Target : ALL
B. Destination : 20.0.0.0/16 and Target : Local
C. Destination : 20.0.0.0/24 and Target : Local
D. Destination : 20.0.0.0/16 and Target : ALL

Show Suggested Answer

Suggested Answer: B 🗳️

by AnonymousJhb at Jan. 23, 2022, 2:18 p.m.

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Comments

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SkyZeroZx

2 years ago

Selected Answer: B

B. Destination: 20.0.0.0/16 and Target: Local. Explanation: The main route table is associated with the VPC and controls the traffic within the VPC. To allow instances in the VPC to communicate with each other, you need to have a route that specifies the VPC CIDR block and the target as "Local." This route tells the VPC that any traffic destined for the VPC CIDR block should be routed internally within the VPC.

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gondohwe

2 years, 10 months ago

B makes sense coz if the VPC CIDR is 20.0.0./16 then to reach instances in the whole VPC,the route table points to the local route of 20.0.0.0/16 from the private subnet of 20.0.0.0/24

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AnonymousJhb

3 years, 4 months ago

Selected Answer: B

Correct https://docs.aws.amazon.com/vpc/latest/userguide/route-table-options.html#route-tables-vpc-peering

upvoted 2 times

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