DX: Direct Connect Flashcards
What is AWS Direct Connect?
A physical connection from your on-premises data center to the AWS cloud. The connection goes from your business location to a DX Location to an AWS Region.
What is allocated when you order Direct Connect from AWS?
A port in a DX Location. You are responsible for providing connectivity to that port, either via a cross connect in the same data center or by extending the DX port (e.g., ordering fiber) to an external building.
How is AWS Direct Connect charged?
There is an hourly cost for the port and an outbound data transfer fee. Inbound data transfer is free.
When would you use AWS Direct Connect?
When you need low and consistent latency and high speeds in a hybrid cloud environment.
Can you use Direct Connect to access the Internet directly?
No. DX connects to VPC and AWS Pubic Services. There is no Internet access without additional infrastructure in your AWS account.
What is a Direct Connect Location?
A data center, not owned by AWS, that is a large region data center. AWS has space and equipment in this data center to aggregate various Direct Connect customers into AWS.
How resilient is Direct Connect?
Direct Connect is not resilient unless you build resiliency into your architecture. You need to provision multiple DX ports (ideally in different DX Locations) and connect them to multiple customer routers in different customer locations.
To use a Site-to-Site VPN with Direct Connect, what type of VIF do you need?
A public VIP. The VGW/TGW are public endpoint addressed using public IPs.
What is Transit Gateway?
A network transit hub that connects VPCs to on-premises networks while significantly reducing network complexity. For example, when peering VPCs, you need to have separate connections between each VPC. As you build a mesh and scale, the number of connections becomes unwieldy.
Since a Transit Gateway supports VPC attachments, VPN Gateways, and Direct Connect Gateway, you can create a hub and spoke architecture with few connections to manage. Also note that TGW does support transitive routing.
Does Transit Gateway support transitive routing?
Yes.
Does Transit Gateway have limitation when peering across regions or accounts?
No. It can peer with different regions and and accounts.
