1001: Virtualization and Cloud Computing Flashcards
Describe Infrastructure as a service (IaaS).
Vendor provides platform or data center, client installs and manages own operating systems and applications
What kind of service is provided when a vendor provides Software as a Solution (SaaS)?
Entire solution - vendor provides operating system, infrastructure, and application. Vendor managed.
How is Platform as a Service (PaaS) different than IaaS?
In PaaS, vendor provides infrastructure and software, client is still involved in the managment.
What is the difference between a public and private cloud solution?
Public - company pays another company to manage the environment
Private - when the environment is hosted by the company itself
What is the biggest drawback to a private cloud solution? Biggest benefit?
High overhead (trained staff to deploy, manage and secure).
Granular control over the security of your data
What is the biggest advantage of a public cloud solution? Biggest disadvantatge?
Putting the service into trained and capable hands.
Your data is at the mercy of the vendor.
Describe a community cloud solution.
One cloud shared by multiple organizations for a common purpose.
What type of machines are used in a cloud environment?
VMs (Virtual Machines)
How are resources allocated in a cloud virtual environment?
Resources are dynamically shared between VMs
Describe rapid elasticity when referring to cloud computing.
The ability to dynamically assign and remove computing resources on the fly
What is the term used when a customer only pays for the resources used rather than paying for unused resources?
On-Demand
What is the term used when CPU and memory resources are stored in containers for shared use by virtual machines?
Resource Pooling
Describe measured service when referring to cloud computing.
Resource utilization is tracked and charged similar to a utilities company
Which type of service is best for customers who cannot predict their cloud resource usage?
Measured service
What is the difference between measured and metered service?
Metered service is paid ahead of time, regardless of actual usage. Measured is paid after the usage period
Gmail is an example of what type of cloud service?
SaaS (Software as a service)
What is provided by most cloud synchronization apps that allow recovery from accidental edits or deletions?
Versioning services
What is a primary benefit of cloud applications over web applications?
Cloud apps sometimes don’t require an internet connection to function
What are the 3 primary models of VDIs (virtual desktop infrastructures)?
Centralized
Hosted
Remote Virtual Desktops
Describe a hosted VDI.
Desktops are maintained by a service provider
What makes a remote virtual desktop VDI different?
Desktop images are copied to the local machine, eliminating the need for a constant network connection
What must occur for a virtual NIC to be able to communicate with the physical network connected to the underlying host device?
The VNIC must be configured to communicate with the physical NIC of the underlying host
What are the hardware requirement differences between emulation software and virtualization software?
Virtualization software often requires that the motherboard support hardware-assisted virtualization.
Emulation software does not.
What is the best method for securing VMs and hypervisors?
Maintain updates and patches
What is a hypervisor?
Software that allows VMs to exist on a server
What is the result of an attacker gaining access to the hypervisor of a virtual environment?
They gain root-level access to all systems
What is the difference between a Type I and Type II hypervisor?
Type I - Hypervisor runs directly on host hardware
Type II - Conventional OS environment that runs the hypervisor 1 level above the OS
Oracle VirtualBox, Citrix Xen, and VMware Workstation are all examples of what type of hypervisor?
Type II
What does the acronym VDI stand for?
Virtual Desktop Infrastructure
What kind of workstation is most likely to be used to connect to a virtual environment?
Thin Client
