RPC (Remote Procedure Call) API calls have the following characteristics: * Parameters can be passed to the calls: RPC allows you to pass parameters to a remote function or service. This enables you to send specific data or instructions to the remote device. * They call a single function or service: RPC is used to invoke a specific function or service on a remote device. Unlike REST APIs, which operate on resources and have multiple endpoints, RPC calls are more focused on invoking a specific action. References: * Implementing Automation for Cisco Enterprise Solutions (ENAUI) v1.2 * Automating Cisco Enterprise Solutions Official Cert Guide * Cisco Learning Network - Enterprise Networking Training Videos