Edge computing is when you push your computing workloads outside of your networks to run close to the destination location. This can be withinin the device itsself or close to the device. Data is processed by its self or by local computer or service, rather then being transmitted to data centre.
When you run workloads on both on-prem and datacentres and VPC (Virtual Prviate Cloud)
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AWS Outposts is a physical rack of services that you can put in your data centres. You can use AWS API and Servces such as EC2 in your datacaentre.
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AWS Wavelength allows you to build and launch your applications in a telecome data centre. You wil have minimal delay, they will be pushed over a 5GB network and be closet to the end user.
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VMWare Cloud on AWS allows you to on-premise virtual machines using VMWare as EC2 instanes.
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AWS Local Zones are edge datacentres outside of an AWS Region. This is for when live in populated areas and you need a faster computing, stroage and database that are outside of an AWS Region.