Azure ExpressRoute enables you to create private connections between Azure datacenters and infrastructure that's on your premises or in a colocation environment. ExpressRoute connections do not go over the public Internet, and offer more reliability, faster speeds, lower latencies and higher security than typical connections over the Internet. In some cases, using ExpressRoute connections to transfer data between on-premises and Azure can also yield significant cost benefits.
With ExpressRoute, you can establish connections to Azure at an ExpressRoute location (Exchange Provider facility) or directly connect to Azure from your existing WAN network (such as a MPLS VPN) provided by a network service provider.
Use ExpressRoute to extend your network to Azure and unlock hybrid IT scenarios:
Storage, Backup and Recovery
ExpressRoute gives you a fast and reliable connection to Azure making it suitable for scenarios like periodic data migration, replication for business continuity, disaster recovery and other high availability strategies. It can also be a cost-effective option for transferring large amounts of data such as datasets for high performance computing applications or moving large VMs between your dev/test environment in Azure and on-premises production environment.
Extend your datacenter
ExpressRoute allows you to securely add compute and storage capacity to your existing datacenter. With high throughput and fast latencies, Azure will feel like a natural extension to your datacenter so you enjoy the scale and economics of the public cloud without having to compromise on network performance.
Build hybrid applications
With predictable, reliable and high-throughput connections offered by ExpressRoute, you can build applications that span on-premises infrastructure and Azure without compromising security or performance. For example, you can have your corporate intranet application running in Azure that authenticates users using an on-premises Active Directory, and serve all corporate users without traffic ever routing through the public Internet.