VPC peering concept in AWS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is VPC peering in AWS?

VPC peering is a way to connect two Virtual Private Clouds (VPCs) so they can communicate with each other privately using private IP addresses, like two houses connected by a private road.

intermediate

Can VPC peering connect VPCs across different AWS regions?

Yes, AWS supports inter-region VPC peering, allowing VPCs in different regions to connect securely and privately.

intermediate

Does VPC peering allow transitive routing between VPCs?

No, VPC peering does not support transitive routing. If VPC A is peered with VPC B, and VPC B is peered with VPC C, VPC A cannot communicate with VPC C through VPC B.

beginner

What must you update to allow traffic between peered VPCs?

You must update the route tables in each VPC to include routes pointing to the peered VPC's CIDR block, so traffic knows where to go.

beginner

Is VPC peering a managed AWS service or does it require VPN or internet gateways?

VPC peering is a managed AWS service that creates a private connection between VPCs without needing VPNs, internet gateways, or physical hardware.

What does VPC peering allow you to do?

A Connect two VPCs privately using private IP addresses

B Connect a VPC to the internet

C Create a VPN connection to on-premises network

D Share public IP addresses between VPCs

VPC peering connects two VPCs privately using private IP addresses.

Which of the following is NOT true about VPC peering?

A It supports transitive routing between peered VPCs

B It requires updating route tables to enable traffic

C It can connect VPCs in different AWS regions

D It does not require VPN or internet gateways

VPC peering does NOT support transitive routing.

To allow communication between peered VPCs, you must:

A Set up a VPN connection

B Create an internet gateway

C Update route tables with peered VPC CIDR blocks

D Assign public IP addresses

Route tables must be updated to direct traffic to the peered VPC.

Can VPC peering connect VPCs in different AWS accounts?

A Only if using VPN connections

B No, only VPCs in the same account can be peered

C Only if both accounts are in the same region

D Yes, VPC peering can connect VPCs across accounts

VPC peering supports connections across different AWS accounts.

Which AWS service is required to create a VPC peering connection?

A AWS Direct Connect

B Amazon VPC

C AWS VPN

D Amazon Route 53

VPC peering is a feature of Amazon VPC.

Explain what VPC peering is and how it helps connect two VPCs.

Think of it as a private road between two neighborhoods.

Describe the limitations of VPC peering, especially about routing and transitive connections.

Imagine direct roads only, no shortcuts through other neighborhoods.