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Question 33 - FCP_WCS_AD-7.4 discussion

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Refer to the exhibit.

Which statement is correct about the VPC peering connections shown in the exhibit?

A.
To route packets directly from VPC B to VPC C through VPC A, you must add a route for network 192.168.0.0/16 in the VPC A routing table.
Answers
A.
To route packets directly from VPC B to VPC C through VPC A, you must add a route for network 192.168.0.0/16 in the VPC A routing table.
B.
You cannot route packets directly from VPC B to VPC C through VPC A.
Answers
B.
You cannot route packets directly from VPC B to VPC C through VPC A.
C.
You can associate VPC ID pcx-23232323 with VPC B to form a VPC peering connection between VPC B and VPC C.
Answers
C.
You can associate VPC ID pcx-23232323 with VPC B to form a VPC peering connection between VPC B and VPC C.
D.
You cannot create a separate VPC peering connection between VPC B and VPC C to route packets directly.
Answers
D.
You cannot create a separate VPC peering connection between VPC B and VPC C to route packets directly.
Suggested answer: B

Explanation:

Understanding VPC Peering:

VPC peering connections allow instances in one VPC to communicate with instances in another VPC. Peering is a one-to-one relationship between two VPCs.

Transit Routing Limitation:

AWS VPC peering connections do not support transitive peering. This means that a packet originating in VPC B cannot be routed through VPC A to reach VPC C. Each pair of VPCs must have its own peering connection.

Routing Table Configuration:

Even if you add a route in the VPC A routing table for the 192.168.0.0/16 network, it won't allow VPC B to communicate with VPC C because of the non-transitive nature of VPC peering.

Comparison with Other Options:

Option A is incorrect because adding a route in VPC A does not overcome the limitation of non-transitive peering.

Option C is incorrect because associating pcx-23232323 with VPC B is not how VPC peering works.

Option D is incorrect because you can create a separate peering connection between VPC B and VPC C, which is the required approach for communication between these VPCs.

AWS VPC Peering Guide: VPC Peering

Limitations of VPC Peering: AWS VPC Peering Limitations

asked 18/09/2024
Mark Oh
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