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Question 99 - ANS-C00 discussion

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You are your company's AWS cloud architect. You have created a VPC topology that consists of 3 VPCs. You have a centralised VPC (VPC-Shared) that provides shared services to the remaining 2 departmental dedicated VPCs (VPCDept1 and VPC-Dept2). The centralised VPC is VPC peered to both of the departmental VPCs, that is a VPC peering connection exists between VPC-Shared and VPCDept1, and a VPC peering connection exists between VPC-Shared and VPC-Dept2.

Select the correct option from the list below.

A.
Network traffic is possible between VPC-Shared instances and VPC-Dept1 and VPC-Dept2 instances as long as the appropriate routes and security groups are in place, but only for communication that is initiated from VPC1-Sharedinstances as the default peering bi-directional communication flag has been disabled.
Answers
A.
Network traffic is possible between VPC-Shared instances and VPC-Dept1 and VPC-Dept2 instances as long as the appropriate routes and security groups are in place, but only for communication that is initiated from VPC1-Sharedinstances as the default peering bi-directional communication flag has been disabled.
B.
Instances within VPC-Dept1 can communicate directly with instances in VPC-Shared, as long as the appropriate routes and security groups are in place, and vice versa regardless of who initiates communication
Answers
B.
Instances within VPC-Dept1 can communicate directly with instances in VPC-Shared, as long as the appropriate routes and security groups are in place, and vice versa regardless of who initiates communication
C.
All network communication remains blocked between all VPCs until the respective peering bi-directional communication flags are set to the appropriate setting that allows traffic to flow.
Answers
C.
All network communication remains blocked between all VPCs until the respective peering bi-directional communication flags are set to the appropriate setting that allows traffic to flow.
D.
Network traffic is possible between VPC-Shared instances and VPC-Dept1 and VPC-Dept2 instances as long as the appropriate routes and security groups are in place, but only for communication that is initiated from VPC1-Sharedinstances as the default peering bi-directional communication flag has been enabled.
Answers
D.
Network traffic is possible between VPC-Shared instances and VPC-Dept1 and VPC-Dept2 instances as long as the appropriate routes and security groups are in place, but only for communication that is initiated from VPC1-Sharedinstances as the default peering bi-directional communication flag has been enabled.
Suggested answer: B

Explanation:

Explanation:

Answers A, C and D are incorrect answers as they reference a non-existing setting - there is no such thing as a "default peering bi-directional communication flag".

Reference: http://docs.aws.amazon.com/AmazonVPC/latest/PeeringGuide/peering-configurations-partial-access.html#oneto-two-vpcs-instances

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asked 16/09/2024
TONG CHEE LOONG
35 questions
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