Ingest telemetry from 200,000 cellular-connected vehicles following Google-recommended practices — which component should you use for ingestion?

Cloud IoT Core is Google's managed service specifically designed for connecting and managing IoT devices at scale. It natively handles device authentication using public/private key pairs, secure communication, and data ingestion from millions of devices, making it ideal for 200,000 cellular-connected vehicles. GKE with SSL Ingress is for web applications, not IoT device management. Compute Engine with SSH keys is for managing virtual machines, not for ingesting telemetry from a large fleet of IoT devices, and SSH is not the standard secure communication protocol for IoT telemetry.