Learning objectives
Describe internal secondary storage (SSD, HDD, eMMC) and external storage (portable SSDs and HDDs, optical discs, flash drives, memory cards and network-attached storage), and recommend a device for a scenario by capacity, speed, durability, portability and cost
Distinguish lossless from lossy compression, and explain how run-length encoding shortens runs of repeated values while transform coding discards detail that viewers or listeners barely notice
Evaluate lossy or lossless compression for text, program files, photographs, music and video, weighing the saving in storage and bandwidth against loss of quality and the need to rebuild the original exactly
Describe the software-as-a-service, platform-as-a-service and infrastructure-as-a-service cloud models, and compare how much control, flexibility, resource management and availability each gives the customer in a stated scenario
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