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bstraction is the concept of dividing specific functions of a server into their own individual systems. Much like subcontracting janitorial, or security services out for a building owner.
Virtualization
Compute - Provided by hardware with Hypervisor software installed
Storage - SAN’s or other storage service store the data and virtual machines
OS - Operating Systems are installed in Virtual Machine files that can be moved like any other file
DRaaS - Services such as Disaster Recovery are provided by online services
SDN - Software Defined Networking
Hardware - Routers, Switches and other networking equipment is “dumb” and receives all configurations from a Management Server
Management Server - manages all rules, logs, and controls network devices
Rules - written in Python or other languages the rules can offer fine tuned configurations that can route traffic by individual devices, users, and even based on outside conditions.
Serverless Architecture
Code - is stored on a basic server and makes calls to other services
Compute - services are now accessed without dealing with the underlying Operating Systems. You call an “encode” service that encodes your video instead of dealing with a Windows Server with ffmpeg.
Storage - is simply a bucket offered by AWS or AZURE
Authentication - even services such as authentication can be made through API calls instead of dealing with Active Directory.