RG: Ch 4: Virtualization and Cloud Computing Flashcards
When a company pays another company to host and manage a cloud environment, it is called what?
A. Public cloud
B. Hybrid cloud
C. Community cloud
D. Private cloud
A. Public cloud
When a company pays another company to host and manage a cloud environment, it is called a public cloud solution. If the company hosts this environment itself, it is a private cloud solution. A hybrid cloud solution is one in which both public and private clouds are part of the solution. A community cloud is one in which multiple entities use the cloud.
Which of the following involves the vendor providing the entire solution?
A. IaaS
B. SaaS
C. PaaS
D. SIEM
B. SaaS
Software as a service (SaaS) involves the vendor providing the entire solution. This includes the operating system, the infrastructure software, and the application. Infrastructure as a service (IaaS) provides only the hardware platform to the customer. Platform as a service (PaaS) provides a development environment. Security Information and Event Management (SIEM) is a system that aggregates all log files and analyzes them in real time for attacks.
Which of the following is the software that allows the VMs to exist?
A. DIMM
B. Hypervisor
C. Azureware
D. NAT
B. Hypervisor
The hypervisor is the software that allows the VMs to exist. Dual inline memory module (DIMM) is a type of memory. There is no software called Azureware, and network address translation is a service that translates private IP addresses to public ones.
Which of the following involves the vendor providing the hardware platform or data center and the software running on the platform?
A. IaaS
B. SaaS
C. PaaS
D. DaaS
C. PaaS
Platform as a service (PaaS) involves the vendor providing the hardware platform or data center and the software running on the platform. This includes the operating systems and infrastructure software. The company is still involved in managing the system. Software as a service (SaaS) involves the vendor providing the entire solution. This includes the operating system, the infrastructure software, and the application. Infrastructure as a service (IaaS) provides only the hardware platform to the customer. Security Information and Event Management (SIEM) is a system that aggregates all log files and analyzes them in real time for attacks.
Which hypervisor type runs directly on the host’s hardware?
A. Type I
B. Type II
C. Hybrid
D. Core
A. Type I
The hypervisor that manages the distribution of the physical server’s resources can be either Type I or Type II. A Type I hypervisor (or native, bare metal) runs directly on the host’s hardware to control the hardware and to manage guest operating systems. Type 2 runs on top of an operating system. There is no hybrid or core type.
Which of the following hypervisors runs within a conventional operating system?
A. Type I
B. Type II
C. Type III
D. Container-based
B. Type II
A Type II hypervisor runs within a conventional operating system environment. With the hypervisor layer as a distinct second software level, guest operating systems run at the third level above the hardware. Container-based is a different approach to virtualization that holds instances in containers. There is no Type III.
Which of the following is an example of a Type II hypervisor?
A. Oracle VirtualBox
B. VMware NSX
C. Hyper-V
D. Citrix Xen Server
A. Oracle VirtualBox
A Type II hypervisor runs within a conventional operating system environment. With the hypervisor layer as a distinct second software level, guest operating systems run at the third level above the hardware. VMware Workstation Citrix Xen Server and VirtualBox exemplify Type II hypervisors.
What is the benefit derived from using hardware-assisted virtualization?
A. Better performance
B. Better security
C. Less power consumption
D. Easier troubleshooting
A. Better performance
Some of the virtualization products, however (such as Microsoft’s Hyper-V, Windows 7 Virtual PC, and Windows 8 Client Hyper-V), require that the motherboard support hardware-assisted virtualization. The benefit derived from using hardware-assisted virtualization is it reduces overhead and improves performance. It does not improve security, lower power consumption, or ease troubleshooting.
In which VDI model are all desktop instances stored in a single server, requiring significant processing power on the server?
A. Centralized
B. Hosted
C. Remote
D. Local
A. Centralized
There are three models for implementing VDI:
Centralized model: All desktop instances are stored in a single server, requiring significant processing power on the server.
Hosted model: Desktops are maintained by a service provider. This model eliminates capital cost and is instead subject to operation cost.
Remote virtual desktops model: An image is copied to the local machine, making a constant network connection unnecessary.
There is no local model.
Which of the following is the ability to add resources as needed on the fly and release those resources when they are no longer required?
A. On-demand
B. Rapid elasticity
C. Virtual sharing
D. Stretched resources
B. Rapid elasticity
One of the advantages of a cloud environment is the ability to add resources as needed on the fly and release those resources when they are no longer required. This makes for more efficient use of resources, placing them where needed at any particular point in time. These include CPU and memory resources. This is called rapid elasticity because it occurs automatically according to the rules for resource sharing that have been deployed. On-demand refers to the ability of the customer to add resources as needed. Virtual sharing and stretched resources are not terms used when discussing the cloud.
