Understanding what ExpressRoute is and its main use cases
In the previous chapter, we covered one of the services that we can use to establish hybrid network connectivity in Azure—the VPN gateway. We explained that it can be used to create an encrypted tunnel between remote networks or users and the Azure virtual network (VNet) over the public internet.
The VPN gateway establishes a secure connection, but network throughput is not guaranteed as traffic is sent over the public internet. Once network traffic leaves any of the connected networks, the throughput is unpredictable as we have very little control over how the traffic is routed or processed (Figure 6.1). This makes this option non-ideal in situations where guaranteed low latency is required. For example, we may have a business requirement to ensure predictable performance for mission-critical services. To achieve this, we can implement ExpressRoute connectivity:
Figure 6.1 – Throughput...