Which Cisco devices include an implementation of gRPC?

The inclusion of gRPC (gRPC Remote Procedure Calls) in IOS-XR devices is significant due to the design and architecture of these devices. gRPC is a high-performance, open-source universal RPC framework that allows for efficient communication between client and server applications. IOS-XR was built with programmability in mind and supports modern protocols to facilitate network automation.

The utilization of gRPC in IOS-XR enables developers and network engineers to create applications and tools that can interact with the network in real-time, enhancing capabilities for orchestration, monitoring, and management. This feature allows for better integration with automation frameworks and enhances the ability to build scalable network applications that comply with modern software development practices.

While other Cisco devices have varying levels of programmability and support for different protocols, IOS-NX2, IOS-VM, and NX-XE devices do not implement gRPC in the same way as IOS-XR. As such, the answer correctly identifies the gRPC-enabled IOS-XR devices, showcasing their advanced capabilities in the realm of network programmability and automation.