Chapter 9

Question 1

Virtualization reduces the number of physical servers, networking devices, supporting infrastructure, and maintenance cost.

Answer 1

Better use of Resources

Question 2

Consolidating servers lowers the monthly power and cooling costs. Reduced consumption helps enterprises achieve a smaller carbon footprint

Answer 2

Less energy consumed

Question 3

Creating a virtual server is far faster than provisioning a physical server.

Answer 3

Faster server provisioning

Question 4

Virtualization offers advanced solutions to keep businesses continuing during a disaster. VMs can be copied to other hardware platforms that may even be in a different data center.

Answer 4

Improved disaster recovery

Question 5

Server consolidation with virtualization reduces the overall footprint of the data center. Fewer servers, network devices, and racks reduce the amount of required floor space.

Answer 5

Less space required

Question 6

Cost savings because less equipment is required, less energy is consumed, and less space is required.

Answer 6

Reduced cost

Question 7

Most server virtualization platforms now offer advanced redundant fault tolerance features, such as live migration, storage migration, high availability, and distributed resource scheduling. They also support the ability to move a virtual machine from one server to another.

Answer 7

Maximize server uptime

Question 8

Virtualization can extend the life of OSs and applications providing more time for organizations to migrate to newer solutions

Answer 8

Support for legacy systems

Question 9

This is the physical computer controlled by a user. VMs use the system resources of the host machine to boot and run an OS.

Answer 9

Host computer

Question 10

This is the operating system of the host computer. Users can use a virtualization emulator such as VirtualBox on the host OS to create and manage VMs.

Answer 10

Host operating system (host OS)

Question 11

This is the operating system that is running in the VM. Drivers are required to run the different OS version.

Answer 11

Guest operating systems (guest OS)

Question 12

Also called bare-metal hypervisor and 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.

Answer 12

Type 1 (native) hypervisor

Question 13

This is hosted by an OS and is commonly used with client-side virtualization. Virtualization software such as VirtualBox and VMware Workstation are examples of a Type 2 hypervisor.

Answer 13

Type 2 (native) hypervisor

Question 14

Processors, such as Intel VT and AMD-V, were specifically designed to support virtualization. The virtualization feature on these processors may need to be enabled. Processors with multiple cores are also recommended as the additional cores increase speed and responsiveness when running multiple VMs.

Answer 14

Processor support

Question 15

Consider that you need memory for your host OS and will now need enough RAM to meet the requirements of each VM and their guest OS.

Answer 15

Memory support

Question 16

Each VM creates very large files to store operating systems, applications, and all of the VM data. You must also factor in that an active VM will require a few GB of storage space. Therefore, large and fast drives are recommended.

Answer 16

Storage

Question 17

Network connection requirements depend on the type of VM. Some VMs do not require outside connections while others do. VMs can be configured in a bridged, NAT, host-only, or a special network to connect only to other VMs. To connect to the Internet, a VM uses a virtual network adapter that simulates the real host adapter. The virtual network adapter then connects through the physical NIC to establish a connection to the Internet.

Answer 17

Network requirements

Question 18

The cloud provider provides access to services, such as email, calendar, communication, and office tools over the Internet on a subscription basis. Users access the software using a browser. Advantages include minimal upfront costs for customers and immediate application availability. SaaS providers include Salesforce customer management relationship (CRM) software, Microsoft Office 365, MS SharePoint software, and Google G Suite.

Answer 18

Software as a Service (SaaS)

Question 19

The cloud provider provides access to operating systems, development tools, programming languages, and libraries used to develop, test, and deliver applications. This is useful to application developers. The cloud provider manages the underlying network, servers, and cloud infrastructure. PaaS providers include Amazon Web Service, Oracle Cloud, Google Cloud Platform and Microsoft Azure.

Answer 19

Platform as a service (PaaS)

Question 20

The cloud provider manages the network and provides organizations access to network equipment, virtualized network services, storage, software, and supporting network infrastructure. There are many advantages for organizations to adopt IaaS. Organizations do not need to invest in capital equipment and only pay for usage on-demand. The provider network includes redundancy and eliminates a single point of failure in the provider network infrastructure. The network can also scale seamlessly based on current requirements. IaaS providers include Amazon Web Service, DigitalOcean, and Microsoft Azure.

Answer 20

Infrastructure as a service (IaaS)