‫Okay, so now we see
‫how we can connect our VPC together
‫through peering connections.
‫And we also saw about the site to site VPN
‫and Direct Connect.
‫And as you can see now,
‫if we have a serious infrastructure on AWS,
‫the network topology can become quite complicated.
‫So to solve this mess, there has been a new service created,
‫which is called the Transit Gateway.
‫So the Transit Gateway is to have a peering connection
‫between thousands of VPC and your on-premises system
‫with a hub-and-spoke star connection.
‫So this looks just like this.
‫You have the VPC Transit Gateway in the middle,
‫and all your Amazon VPC, your Direct Connect gateway,
‫as well as your VPN connections
‫are connected through the Transit Gateway.
‫So you don't need to peer the VPC with one another,
‫you don't need to have different connections and routes
‫between each of them and Direct Connect
‫and side to side VPN, all of this is done
‫within a single gateway,
‫that will provide this functionality.
‫So it works with Amazon VPCs,
‫it works with the VPN connections
‫and the Direct Connect gateways.
‫And that's it.
‫So when in the exam, you see a way to connect hundreds
‫or thousands of VPC together,
‫with as well your on-premise infrastructure,
‫think no more than the Transit Gateway.
‫I hope that was helpful,
‫and I will see you in the next lecture.