What is the term for secure individual private cloud computing model hosted within public cloud computing?

Compute Engine offers autoscaling feature to automatically add or remove VM instances from a managed instance group (MIG) based on increasing or decreasing in load. Autoscaling allows your apps to easily manage increases in traffic, and it minimizes the costs when the required need for resource is low.

Layered cloud architecture is a design approach that is used in cloud computing to organize the different components of cloud infrastructure.

The layered architecture of cloud computing consists of several layers, each with its own set of functions and responsibilities.

There are five implementation levels of virtualization in cloud computing:

• Instruction Set Architecture Level (ISA): This level of virtualization is the lowest level of virtualization and is used to create a virtual machine that can run on any hardware platform.
• Hardware Abstraction Level (HAL): This level of virtualization is used to create a virtual machine that can run on a specific hardware platform.
• Operating System Level: This level of virtualization is used to create a virtual machine that can run on a specific operating system.
• Library Level: This level of virtualization is used to create a virtual machine that can run on a specific library.
• Application Level: This level of virtualization is used to create a virtual machine that can run on a specific application.

In cloud computing, enterprises may not use all levels of virtualization implementation. Based on the company's workings and its preference for the level of virtualization, the level of virtualization is used.

Cloud computing is a concept that involves pooling physical resources and offering them as virtual resources over the internet.  It works by allowing users to access applications, data, and resources from anywhere in the world.

This is done by storing and processing data on remote servers that are hosted and maintained by a cloud computing provider. Clients are charged for the right to use their clouds and an ecosystem to communicate between devices. 

EUCALYPTUS is used in cloud computing by organizations that want to build and operate their own private or hybrid cloud environments. By using EUCALYPTUS, organizations can create virtual machine instances, storage controller and networking, implement user access controls to manage cloud resources. It enables the pooling of storage, compute, and network resources and scaling them as per the fluctuation in application workloads.