Explanation/Reference:

Micro segmentation(also sometimes referred to as hyper segregation) leverages virtual network topologies to run more, smaller, and more isolated networks without incurring additional hardware costs that historically make such models prohibitive. Since the entire networks are defined in software without many of the traditional addressing issues, it is far more feasible to run these multiple, software- defined environments.
Reference: CSA Security GuidelinesV.4(reproduced here for the educational purpose)

Measured service is defined as "Resource usage can be monitored, controlled, and reported, providing transparency for both the provider and consumer of the utilized service. "

Storing is the act committing the digital data to some sort of storage repository and typically occurs nearly simultaneously with creation.
Reference: CSA Security Guidelines V.4(reproduced here for the educational purpose)

IaaS uses the following storage types:
Volume storage: A virtual hard drive that can be attached to a virtual machine instance and be used to host data within a file System, Volumes attached to IaaS instances behave just like a physical drive or an array does. Examples include VMware Virtua Machine File System(VMFS), Amazon Elastic Block Store(EBS), RackSpace Redundant Array of Independent Disks (RAID), and OpenStack Cinder.
Object storage: Similar to a file share accessed via APIs or a web interface. Examples include Amazon S3 and Rackspace cloud files.