Because Defender for Cloud is an Azure-native service, many Azure services are monitored and protected without needing any deployment. However, if you also have an on-premises datacenter or are also operating in another cloud environment, monitoring of Azure services may not give you a complete picture of your security situation.
When necessary, Defender for Cloud can automatically deploy a Log Analytics agent to gather security-related data. For Azure machines, deployment is handled directly. For hybrid and multi-cloud environments, Microsoft Defender plans are extended to non Azure machines with the help of Azure Arc. Cloud security posture management (CSPM) features are extended to multi-cloud machines without the need for any agents.