Direct Connect / ExpressRoute
Direct Connect (AWS) and ExpressRoute (Azure) are services that provide a dedicated, private physical network connection between an organization's on-premises infrastructure and a cloud provider's network, bypassing the public internet…
Definition
Direct Connect (AWS) and ExpressRoute (Azure) are services that provide a dedicated, private physical network connection between an organization's on-premises infrastructure and a cloud provider's network, bypassing the public internet entirely.
Overview
Direct Connect and ExpressRoute are the AWS and Microsoft Azure equivalents of the same underlying idea: instead of routing traffic between an on-premises data center and the cloud over the public internet — even through an encrypted Cloud VPN — a customer provisions a dedicated physical link through a colocation facility or network partner directly into the cloud provider's backbone. This private-connection model delivers more consistent bandwidth, lower and more predictable latency, and often reduced data-transfer costs compared to internet-routed traffic, which matters for latency-sensitive applications, large recurring data transfers, and hybrid architectures that treat the cloud as an extension of an existing data center. Because the connection doesn't traverse the public internet, it also reduces exposure to certain classes of network-based attacks, though traffic is not automatically encrypted the way a VPN tunnel is — many organizations layer VPN encryption on top of the private connection for sensitive workloads. Setting up Direct Connect or ExpressRoute typically involves working with a network provider or colocation facility, provisioning cross-connects, and configuring routing (often via BGP), which makes it a more involved and costlier undertaking than spinning up a Cloud VPN. It's the kind of hybrid networking topic covered in depth in cloud architecture training like AWS Solutions Architect.
Key Features
- Dedicated physical connection bypassing the public internet
- More consistent bandwidth and lower, more predictable latency
- Provisioned through colocation facilities or network partners
- Often reduces data-transfer costs versus internet-routed traffic
- Not encrypted by default — often combined with VPN for sensitive data
- Typically configured with BGP for dynamic routing