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- High-volume data transfer
- Ultra-low latency data transfer – Traffic using peering connections makes exactly one hop. Traffic using a Transit Gateway makes about four hops.
When Security Groups in one VPC need to reference Security Groups in the peered VPC.– → As of November 2024, our Transit Gateway connectivity does not support cross-VPC Security Group references.- When one of the VPCs is not connected to the Transit Gateway (and thus not using Direct Connect).
- When both VPCs reside in AWS account(s) that you own, and your team has expertise the to setup peering.
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