7.3.4 A security failure at the root network will likely compromise the security of all customers. And this security must be managed for arbitrary communications and multiple tenants, some of which must be considered adversarial.

B. True A security failure at the root network of a cloud provider will generally not compromise the security of all customers due to the multitenancy configuration. In a multitenancy environment, multiple customers or tenants share the same physical infrastructure, but their resources and data are logically separated and isolated from each other. The cloud provider implements various security measures to ensure the isolation and protection of customer data. This includes network segmentation, virtualization, access controls, and security mechanisms at various levels. These measures are designed to prevent cross-customer data breaches and limit the impact of any security failures to the affected tenant only. While no system is completely immune to security breaches, the multitenancy configuration in cloud computing helps mitigate the risk of widespread security compromises across different customers in the event of a security failure at the root network of the cloud provider.