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subtitle: Learn to configure cloud-hosted and self-hosted routers
description: Learn how to configure the Apollo GraphOS Router with environment variables, command-line options and commands, and YAML configuration files.
redirectFrom:
- /router/configuration/overview/
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You can configure a router in multiple ways. Because cloud-hosted and self-hosted routers share the common foundation of Apollo Router Core, all routers support declarative configuration with a YAML file, usually named `router.yaml`. Differences between configuring cloud-hosted and self-hosted routers:
