10.5.10 Practice Questions
What type of resources offer the following advantages? Flexibility of access Ease of use Self-service provisioning of resources API availability Metering of services Ability to try out software applications
cloud
Rachel, an employee in the support department, wants to run a virtual machine on her computer from which she can troubleshoot customer issues. Which of the following must you complete before virtualization will work on her computer?
Enable virtualization support in the BIOS settings. For virtualization to work on Rachel's PC, you must ensure that the virtualization support is enabled in the BIOS settings. Some CPUs will have Virtualization Support turned on by default, and others will not. Although additional memory will increase performance of a computer using virtualization, it may not be required depending on the amount of memory currently installed. Likewise, an additional hard disk may be advantages in storing or running virtual machines, but they are not a requirement. Most modern CPUs support virtualization and do not require the BIOS to be flashed.
Which term describes the layer of software that resides between the virtual operating system and the physical hardware it runs on in a virtualization environment?
Hypervisor A hypervisor is a thin layer of software that resides between the virtual operating system(s) and the hardware. A hypervisor allows virtual machines to interact with the hardware without going through the host operating system. A hypervisor manages access to system resources such as: CPU Storage RAM A virtual machine is a software implementation of a computer system that executes programs like a physical machine. A Virtual hard disk is a disk file used by a virtual machine. Workload management relates to the portability of virtual machines.
You were recently hired by a small start-up company. The company is in a small office and has several remote employees. You have been asked to find a business service that would accommodate the current size of the company but would also be able to scale as the company grows. The service needs to provide adequate storage, as well as additional computing power. Which cloud service model should you use?
IaaS Infrastructure as a Service (IaaS) delivers infrastructure to the client, such as processing, storage, networks, and virtualized environments. The client deploys and runs software without purchasing servers, data center space, or network equipment. Software as a Service (SaaS) delivers software applications to the client either over the Internet or on a local area network. Platform as a Service (PaaS) delivers everything a developer needs to build an application onto the cloud infrastructure. The deployment comes without the cost and complexity of buying and managing the underlying hardware and software layers. Data as a Service (DaaS) stores and provides data from a centralized location without the need for local collection and storage.
You want to be able to monitor and filter VM-to-VM traffic within a virtual network. What should you do?
Implement a virtual firewall within the hypervisor. Virtualized hosts are susceptible to the same network exploits as physical network hosts and need to be protected by a firewall. By implementing a virtual firewall within the hypervisor itself, you can monitor and filter traffic on the virtual network as it flows between virtual machines. While routing VM-to-VM traffic through a physical firewall would work, it is very inefficient. A virtual router with VRF is used to create multiple networks from a single router interface. Configuring VLAN membership would not allow you to monitor and filter traffic.
What key advantage does a virtual router have over a physical router?
Multiple networks can be connected to a single interface. The key advantage of a virtual router is it can support multiple networks on a single router interface. It does this by using a different routing table for each network. Physical routers are limited to a single network on each interface. Like physical routers, virtual routers use routing protocols to route data between networks. The Virtual Router Redundancy Protocol is used by physical routers to specify backup routers in the case of a failure. Virtual routers do not offer significant performance increases.
Which of the following best describes the Platform as a Service (PaaS) cloud computing service model?
PaaS delivers everything a developer needs to build an application onto the cloud infrastructure. Platform as a Service (PaaS) delivers everything a developer needs to build an application onto the cloud infrastructure. The deployment comes without the cost and complexity of buying and managing the underlying hardware and software layers. Software as a Service (SaaS) delivers software applications to the client either over the internet or on a local area network. Infrastructure as a Service (IaaS) delivers infrastructure to the client, such as processing, storage, networks, and virtualized environments. The client deploys and runs software without purchasing servers, data center space, or network equipment. Data as a Service (DaaS) stores and provides data from a centralized location without the need for local collection and storage.
Match each cloud computing definition on the left with the appropriate characteristic on the right. Each characteristic may be used once, more than once, or not at all.
Provides resources to a single organization. Private cloud Combines public, private, and community cloud resources from different service providers. Hybrid Cloud Designed to be shared by several organizations. Community cloud Provides computing resources that are accessible by the general public. Public cloud Keeps one organization data separate and secure from any other organization using the same service provider. Private Cloud
A company has subscribed to a cloud service that offers cloud applications and storage space. Through acquisition, the number of company employees quickly doubled. The cloud service vendor was able to add cloud services to these additional employees without requiring hardware changes. Which of the following cloud concepts does this represent?
Rapid elasticity Rapid elasticity describes the cloud provider's ability to increase or decrease service levels to meet customer needs without requiring hardware changes. Measured service refers to the way cloud services are measured or metered for billing purposes or according to a service level agreement. An on-demand cloud service is available to user at any time. Cloud services providers use resource pooling to supply services to multiple customers using shared physical resources.
Which of the following cloud computing solutions delivers software applications to a client either over the internet or on a local area network?
SaaS Software as a Service (SaaS) delivers software applications to the client either over the internet or on a local area network. Infrastructure as a Service (IaaS) delivers infrastructure to the client, such as processing, storage, networks, and virtualized environments. The client deploys and runs software without purchasing servers, data center space, or network equipment. Platform as a Service (PaaS) delivers everything a developer needs to build an application onto the cloud infrastructure. The deployment comes without the cost and complexity of buying and managing the underlying hardware and software layers. Data as a Service (DaaS) stores and provides data from a centralized location without the need for local collection and storage.
A technician is unable to install virtualization software on a host computer. The host has more free disk space than required. Which of the following is MOST likely to be the cause?
The motherboard UEFI/BIOS doesn't support hardware assisted virtualization. Most virtualization software requires that the motherboard UEFI/BIOS supports hardware assisted virtualization. While a CPU with multiple core processors will increase performance, it is not usually a requirement for virtualization software. Virtualization software may require a minimum amount of physical memory. However, it is not likely that it would not install if there were not enough memory to support both the host and any VM. While placing VM files on an auxiliary hard drive may increase performance, it is unlikely to be a requirement to install the virtualization software.
Match the virtualization implementations on the left with the appropriate characteristic on the right. Each type of implementation may be used once, more than once, or not at all.
The virtual machine completely simulates a physical computer system. Full virtualization Operating systems do not need modification to run within virtual machines. Full virtualization Only some of the components of a virtual machine are virtualized. Partial virtualization Guest operating systems directly access hardware resources in the hypervisor host system. Paravirtualization
The servers for the company are all virtual machines and hosted on the same hypervisor. You need to keep users in all other departments from accessing the virtual servers used by the finance department. Which of the following technologies should you use to logically isolate the network?
VLANs A virtual LAN (VLAN) uses switch ports to define a broadcast domain. When you define a VLAN, you assign devices on different switch ports to a separate logical (or virtual) LAN. NIC teaming is used to combine two or more physical connections into one logical connection and does not isolate networks. While MAC filtering could be used to control access, it is easily bypassed by MAC spoofing. Subnetting is used to divide large networks into smaller networks. Subnetting can be used to isolate sensitive systems, but it is not as secure as using VLANs.
Which term refers to a software implementation of a computer system that executes programs like a physical machine?
Virtual Machine A virtual machine is a software implementation of a computer system that executes programs like a physical machine. A virtual machine functions as a self-contained and autonomous system. A hypervisor is a thin layer of software that resides between the virtual operating system(s) and the hardware. The physical host is the actual hardware that the hypervisor software runs on. Workload management relates to the portability of virtual machines.
Which of the following statements about virtual NICs are true? (Select TWO.)
Virtual NICs need the appropriate driver installed to function. Multiple virtual NICs can be added to a virtual machine. Within each virtual machine, you can configure one or more virtual network interfaces, which function in much the same manner as physical network interfaces. Virtual interfaces use Ethernet standards to transmit and receive frames on the network. The operating system within the virtual machine must have the appropriate driver installed to support the virtual network interface, just as with a physical network interface. When you configure a virtual network interface within a virtual machine's configuration, you can specify: The type of physical network interface to emulate. This allows for the best possible driver support by the operating system within the virtual machine. A MAC address. Most hypervisors automatically assign a MAC address to each virtual network interface. However, some hypervisors allow you to use a custom MAC address, if needed. The network to connect to. Most hypervisors allow you to define many different virtual networks. When you configure a virtual network interface, you will select which virtual network you want it to be connected to.
