AWS Certified Solutions Architect Associate Test 8

http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/block-device-mapping-concepts.htmlAmazon EC2 supports two types of block devices:
Instance store volumes (virtual devices whose underlying hardware is physically attached to the host computer for the instance)
EBS volumes (remote storage devices)
A block device mapping defines the block devices (instance store volumes and EBS volumes) to attach to an instance.