Virtualization Flashcards
What is virtualization?
This allows a single computer to virtually host multiple devices that share the hardware.
Virtualization software seperates the harwdare from the Virtual Machine (VM) instances.
They have their own OS and connect to hardware resources through the sofwtare running on a host computer.
An imageof a VM can be saved as a file and then re-started when required.
What is cloud computing?
Cloud computing seperates the applications from the hardware.
It provides on-demand computing services over the network.
Service providers such as Amazon Web Services (AWS) own and manage the cloud infrastructure that includes the networking devices, servers, and storage devices and is usually housed in a data center.
What is the difference between vitualization and cloud computing?
Virtualization streams data to a host and they use its hardware.
Cloud computing has data streamed to it, typically using its software alone.
CC is accessible by anyone with the right credentials, virtualization is restricted to these servers and their networks.
List the eight forms of dedicated servers?
Web Server Email Server. SQl Server. File Server. DHCP Server. Active Directory (AD) Server. AAA RADIUS Server. Network Management Server (NMS).
What are the forms of OS typcially used for servers?
Windows.
Linux.
What are the problems with traditional server stuctures?
Wasted Resources-Servers can tend to sit idle for long periods of time. This wastes energy.
Single Point of Failure-If they fail/go offline or are comprimised then you’re in big trouble as their are no backups.
Server Sprawl-The servers themselevs take up too much space.
What hardware resources do traditonal servers use?
CPU
Memory
NIC
Disk
Whihc two traditonal servers use Linux OS?
AAA RADIUS.
Network Management.
What adresses traditonal server problems?
Virtualizing their usage, in order to sue their resources more effectively.
What is hypervisor? What does it do?
It is a program that manages computer resources and VMs.
They create and manage VMs and allocate access to the hosts physical resources.
What are the advanatges of virtualization?
Better use of resources. Less energy consumed. Faster server provisioning. Improved disaster recovery. Less space required. Reduced costs. Maximize server uptime. Support for legacy systems.
What is a guest OS? What are its qualities?
The guest OS is the OS of the VM being hosted on a device.
It does not have to be the same OS as the VM it is running.
What are the types of Hypervisor?
Type 1 Native.
Type 2 Hosted.
What is another name for the Hypervisor?
The Virtual Machine Manager (VMM).
What are the qualities of type 1 Hypervisor? Where are they used?
Bare metal hypervisors typically used with server virtualization.
It runs directly on the hardware of a host and manages the allocation of system resources to virtual operating systems.
What are the qualities of type 2 Hypervisor? Where are they used?
This is hosted by an OS and is commonly used with client-side virtualization. Virtualization software such as Windows Hyper-V and VMware Workstation are examples of a Type 2 hypervisor.
What are the basic requiremenst that all VM machines share?
Processor Support.
Memory Support.
Storage.
Network Requirements.
How do we use the cloud?
Through a virtual interface such as Office365.
What are common applications of cloud computing?
Email.
File storage.
Virtual Desktop (Infratsructrue VDI).
Windows Virtual Desktop (WVD).
What are the three forms of cloud services?
Software as a service (SaaS)
Platform as a service (PaaS)
Infrastructure as a service (IaaS)
What are public clouds?
These are cloud based srevices available to the general population. Google drive/Gmail falls under this.
What are private clouds?
These are clud based apps/services offerd to specific organizations or entities such as the government.
What are community clouds?
A cloud created for the use of a specific community.
What are hybrid clouds?
A cloud made up of two or more clouds which are distinct from each other in their purpose/use.
What are the characteristics of CC?
On Demand. Rapid Elasticity. Resource Pooling. Measured and Metered Service. Broad Network Access.
