Your organization is keen on migrating a monolithic application to a microservices architecture on GCP. They are particularly concerned about the networking aspects such as service discovery, load balancing, and fault tolerance. What should you recommend?

*Explanation: * _Kubernetes Engine with Istio._ This recommendation aligns with the networking requirements for a microservices architecture, offering features like service discovery, load balancing, and fault tolerance. Kubernetes Engine combined with Istio provides the necessary capabilities for managing a microservices-based application. Other options are not as well-suited for these networking aspects in a microservices context.