[AWS] Transit Gateway

AWS Transit Gateway is used to simplify your AWS network architecture (topology) by allowing to have transitive peering between hundreds and thousands of VPC and on-premise data centers.


  • A transit gateway implements a hub-and-spoke network topology.
  • It can be used across multiple AWS accounts using Resource Access Manager (RAM).
  • It can use route tables to control access among VPCs.
  • It works with VPN and Direct Connect.
  • It supports IP multicast.
  • A transit gateway scales elastically based on the volume of network traffic. Routing through a transit gateway operates at layer 3, based on their destination IP addresses.

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