exam 3

How is vendor-managed private cloud different from "internal" private cloud?

Vendor-managed private cloud indicates Infrastructure as a Service offering, where a cloud supplier/vendor sets up and runs IaaS for a client, using dedicated physical servers. The company (client) doesn't own the infrastructure, they pay the vendor to sue it. "Internal" private cloud is not really a cloud solution. It's usually used to denote a company running their own virtual infrastructure. The company owns and manages their own hardware/software/storage.

Based on an Amazon Web Services case study of your choice, describe how the company in the case study uses and benefits from AWSs of their choice.

Your chosen AWS case study outline.

RAID 1 configuration... a. mirrors data across 2 drives b. stripes data and provides no parity c. stripes data and parity across multiple drives d. stripes data across multiple drives with a drive for parity

a. mirrors data across 2 drives

Cloud computing is dynamically scalable because... a. users only consume the amount resources they actually want b. resources can be accessed from any type of computer on the Internet. c. the usage model is based around what users want to achieve rather than specific SW and HW d. users do not have to pay any fixed costs

a. users only consume the amount resources they actually want

The least expensive IaaS hosting category... a. uses virtual rather than physical servers b. uses physical rather than virtual servers c. uses equal mix of physical and virtual servers d. does not use any servers

a. uses virtual rather than physical servers

A standard x86 Operating System needs to have direct access to hardware and must execute its privileged instructions in Ring ___. a. 1 b. 0 c. 3 d. -1

b. 0

Who is responsible for providing and managing security for the infrastructure and physical hosts in cloud computing? a. A company's Internet IT department b. A cloud provider c. A company software developer d. All the above

b. A cloud provider

Disk _____ is a variation of disk _______ in which each of multiple storage disks has its own controller. a. Mirroring; duplexing b. Duplexing; mirroring c. Striping; mirroring d. Duplexing; striping

b. Duplexing; mirroing

An operating system that runs in a virtual machine is referred as... a. Host b. Guest c. Hypervisor d. VMM

b. Guest

Which virtualization architecture is less efficient/consumes more resources on a computer? a. Hypervisor b. Hosted c. Bare-metal d. all are equally efficient

b. Hosted

What is the name of the software embedded with the hypervisor that allows virtual machines to send and receive traffic through their virtual NICs? a. physical NIC b. virtual switch c. external hardware switch d. VMM

b. virtual switch

An operating system that runs virtualization software as an application is referred to as... a. Guest b. VMM c. Host d. Hypervisor

c. Host

You pay a supplier an hourly fee to rent a virtual server for the purpose of installing and testing your new application. That's an example of... a. SaaS b. PaaS c. IaaS d. none of the above

c. IaaS

What is virtual infrastructure? a. The ability to combine multiple hard drives to act as a single logical drive. b. A file that is created to simulate a stand-alone computer with an operating system and hardware. c. A thin layer of software that resides between a VM and hardware, allowing VMs to interact with the hardware. d. A software suite that allows dynamic mapping of compute, storage, and network resources to VMs and business applications.

d. A software suite that allows dynamic mapping of compute, storage, and network resources to VMs and business applications.

What is the difference between a standard virtual switch and a distributed virtual switch? a. A standard VS only allows VMs on the same host to interact with each other, while a distributed VS allows VMs to interact with the other hosts on the network. b. A distributed VS exists on a single host, while a standard VS extends its ports and traffic management across multiple hosts. c. A standard VS is implemented as a software solution, while a distributed VS is a set of separate hardware switches. d. A standard VS exists on a single host, while a distributed VS extends its ports and traffic management across multiple hosts.

d. A standard VS exists on a single host, while a distributed VS extends its ports and traffic management across multiple hosts.

Which of the following is true about local file systems? a. They provide abstract file view to users and applications. b. They organize where data is placed on storage devices. c. They store and retrieve blocks of data to/from storage devices. d. All the above are true.

d. All of the above are true.

Software RAID processing is handled by... a. Disk controller b. Disc drives c. SCSI d. Computer operating system

d. Computer operating system

Which of the following have similar functionality? a. iSCSI and RAID b. RAID and FCP c. SAN and RAID d. FCP and iSCSI

d. FCP and iSCSI

Which of the following is NOT a part cloud computing model? a. Iaas b. Paas c. Saas d. Naas

d. Naas

____________ refers to communication between the guest OS and the hypervisor to improve virtualization performance and efficiency a. Binary translation b. HW-assisted virtualization c. Bare-metal approach d. Paravirtualization

d. Paravirtualization

iSCSI is used for _________ a. RAID b. DAS c. NAS d. SAN

d. SAN

iSCSI is encapsulated in... a. RAID b. SCSI c. Fibre Channel d. TCP/IP

d. TCP/IP

Which of the following is NOT true about network file systems? a. They are application layer services b. They allow transparent access to files for network users c. They use file-level access d. They use block-level access

d. They use block-level access

Which of the following is am area of concern/risk of cloud computing? a. sensitive data can be compromised b. dependence on a reliable internet connection c. availability of services depends on cloud provider d. all of the above

d. all of the above

Which of the following is an example of virtualization? a. SAN b. VLAN c. RAID d. all the above

d. all the above

Which of the following is NOT an advantage of cloud computing over traditional data center? a. pay-per-use resources b. accessible from most devices c. promotes collaboration d. faster access

d. faster access

Identify components A, B, C and D on the diagram below to illustrate Type 1 Hypervisor architecture.

A: Hardware B: Hypervisor C: Virtual Machine D: Guest OS

In the picture below identify network storage solution methods (A and B) and the corresponding type of access (file or block-level) (X and Y) on each network.

A: SAN X: block-level B: NAS (or DAS) Y: file-level

List and discuss at least 3 concerns with Cloud computing.

Discuss three of the following: Security Privacy loss Loss of control over your data Availability Regulatory compliance/violations

Hardware RAID processing is performed by ... a. A dedicated disk controller b. Disk drive c. Computer operating system d. SCSI

a. A dedicated disk controller

Which of the following is NOT an example of cloud computing? a. A user accessing his email account on the corporate email server b. A user creating a Facebook application c. A user accessing a Yahoo email account d. A user accessing a supplier's virtual to test an application

a. A user accessing his email account on the corporate email server

How does paravirtualization compare to binary translation? a. Binary translation allows for transparent virtualization, paravirtualization doesn't b. Paravirtualization allows for transparent virtualization, binary translation doesn't c. Binary translation is more efficient than paravirtualization d. Paravirtualization requires more resources than binary translation

a. Binary translation allows for transparent virtualization, paravirtualization doesn't

Which of the following is a disadvantage of PaaS? a. Developers are restricted to a particular "toolkit" provided by the PaaS supplier. b. PaaS offering requires the developer to provide their own Operating System and compiler c. PaaS makes it difficult for multiple developers to work together d. PaaS requires significant setup time and upfront investment by the developer

a. Developers are restricted to a particular "toolkit" provided by the PaaS supplier.

Hardware-assisted virtualization refers to... a. Modifying a CPU to include extended set of instructions. b. Using hardware drivers in the hypervisor. c. Modifying an operating system to include extended set of instructions. d. Running hypervisor directly on top of hardware.

a. Modifying a CPU to include extended set of instructions.

Which of the following RAID levels does not provide fault-tolerance? a. RAID 0 b. RAID 6 c. RAID 1 d. RAID 5

a. RAID 0

Which of the following is NOT true about RAID 1? a. Read/Write performance is greatly improved by spreading the data across many drives b. It has the highest disk overhead (100%) of all RAID levels c. It is fault-tolerant d. It requires a minimum of 2 drives to implement

a. Read/Write performance is greatly improved by spreading the data across many drives

What network storage technology offers high-speed block-level network access? a. SAN b. NFS c. NAS d. RAID

a. SAN

Fibre Channel Protocol (FCP) is used to encapsulate... a. SCSI commands b. client-server file requests c. TCP/IP d. RAID

a. SCSI commands

A user accessing a cloud supplier's payroll application is an example of... a. SaaS b. PaaS c. IaaS d. none of the above

a. SaaS

Which of the following statements is true? a. The fact that cloud computing has no fixed costs makes it more attractive to small companies b. The fact that cloud computing has no fixed costs makes it more attractive to large companies c. The fact that cloud computing has no variable costs makes it more attractive to small companies d. The fact that cloud computing has no variable costs makes it more attractive to large companies

a. The fact that cloud computing has no fixed costs makes it more attractive to small companies

Which of the following is NOT true about a server using DAS? a. The server offers high speed block-level access to network clients. b. The server can use file-level protocol (e.g. NFS, CIFS) for "sharing" data with clients. c. The server communicates with the storage device using a block interface. d. The server can make the data on the storage device available to the clients on the network.

a. The server offers high speed block-level access to network clients.

__________________ is when a virtual machine simulates a real physical host and allows an operating system to run without being modified. a. Transparent (or full) virtualization b. Virtual networking c. Paravirtualization d. Hosted virtualization

a. Transparent (or full) virtualization

Which of the following is NOT a technique that exists for handling privileged instructions to virtualize x86 CPU architecture? a. VMM b. Paravirtualization c. Hardware-assisted virtualization d. Binary Translation

a. VMM

Which of the following is true about iSCSI? a. it uses TCP/IP for data transfer b. it supports file-level data transfer c. it requires specialized hardware d. it is used by NAS devices

a. it uses TCP/IP for data transfer

What is a VM? a. It is an OS that has been modified to run on top of a hypervisor. b. It is a tightly isolated software container with an OS and applications inside. c. It is a thin layer of software that provides a level of abstraction between hardware and virtual machines. d. It is an OS that runs on top of a hypervisor.

b. It is a tightly isolated software container with an OS and applications inside.

What technology transfers file-level data over the network? a. RAID b. NAS c. iSCSI d. SAN

b. NAS

Using a browser, you develop and run your ecommerce website and application on a supplier's server that runs Java-based... a. SaaS b. PaaS c. IaaS d. none of the above

b. PaaS

Which of the following is NOT a characteristic of Cloud computing service? a. Dynamically scalable b. Requires an initial fixed investment c. Device independent d. Task oriented

b. Requires an initial fixed investment

In ______________ a file system (that is sued to retrieve a file from disk) is located on a computer accessing the file. a. NAS b. SAN c. RAID d. All the above

b. SAN

What does Fibre Channel protocol encapsulate? a. iSCSI b. SCSI c. TCP/IP d. NFS

b. SCSI

The ability to install and run multiple operating systems concurrently and independently on a single physical machine is called.... a. Network virtualization. b. Server virtualization. c. SAN. d. Storage virtualization.

b. Server virtualization.

Google Docs is an example of... a. Infrastructure as a Service b. Software as a Service c. Application as a Service d. Platform as a Service

b. Software as a Service

What model of Cloud computing allows users to use a video editing application from a provider as a subscription service? a. Application as a Service b. Software as a Service c. Infrastructure as a Service d. Platform as a Service

b. Software as a Service

Spreading Data from one source (one block) across multiple disks is: a. Redundancy b. Striping c. Mirroring d. Switching

b. Striping

In a ________ hosting category of IaaS, customer's applications share other customers' infrastructure. a. private b. cloud c. dedicated d. shared

b. cloud

What is the most efficient category of IaaS in terms of cost and resource usage? a. private hosting b. cloud hosting c. hybrid hosting d. dedicated hosting

b. cloud hosting

What's the feature of RAID that allows users to continue access data on an array even if one of the disks fails? a. faster reads/writes b. fault tolerance c. striping d. performance improvement

b. fault tolerance

What is the name of the software layer that provides physical resources abstraction and allows virtual machine creation? a. host b. hypervisor c. guest d. supervisor

b. hypervisor

What is a VEB (Virtual Embedded Bridge)? a. it's an external bridge responsible for performing switching for VMs b. it's a software responsible for performing switching for VMs c. it's an external switch responsible for performing switching for VMs d. it's a software running on a network device (such as a bridge or a switch) responsible for performing switching for VMs

b. it's a software responsible for performing switching for VMs

What is a disadvantage of full/transparent virtualization on x86 platforms? a. there is no transparent virtualization on x86 platforms b. more overhead due to its complexity c. improved performance due to the guest OS being modified d. guest OS has to be ported, or modified

b. more overhead due to its complexity

Cloud computing is device-independent because... a. users only consume the amount resources they actually want b. resources can be accessed from any type of computer on the Internet. c. the usage model is based around what users want to achieve rather than specific SW and HW d. users do not have to pay any fixed costs

b. resources can be accessed from any type of computer on the Internet.

What is a type 2 hypervisor? a. virtualization software that runs directly on physical host server hardware b. virtualization that runs in a host OS as an application c. virtualization software that runs in a guest OS as an application d. modified guest OS

b. virtualization that runs in a host OS as an application

Paravirtualization refers to the process of... a. Allowing each host operating system run unmodified in isolation. b. Modifying a host operating system. c. Modifying a guest operating system. d. Allowing each guest operating systems run unmodified in isolation.

c. Modifying a guest operating system.

Which of the following protocols allows you to access files on remote file servers? a. FCP b. iSCSI c. NFS d. SCSI

c. NFS

Which RAID level provides fault-tolerance and improved performance? a. RAID 0 b. RAID 1 c. RAID 5 d. All the above

c. RAID 5

Which of the following is a reason NOT to use cloud-based service offerings? a. Demand for the service is very volatile with significant ups and downs b. An organization does not have much capital to invest c. Regulatory compliance forbids the outsourcing of data storage and processing d. An organization is growing rapidly

c. Regulatory compliance forbids the outsourcing of data storage and processing

With HW-assisted virtualization, virtualization software runs in... a. Ring 0 b. Ring 1 c. Ring -1 d. Ring 2

c. Ring -1

Which of the following is NOT an advantage of virtualization? a. consolidation of resources. b. isolation of virtual machines. c. applications run faster. d. portable virtual machines.

c. applications run faster.

Cloud computing is task centric because... a. users only consume the amount resources they actually want b. resources can be accessed from any type of computer on the Internet. c. the usage model is based around what users want to achieve rather than specific SW and HW d. users do not have to pay any fixed costs

c. the usage model is based around what users want to achieve rather than specific SW and HW

Cloud computing is charged on a usage basis which means a. users only consume the amount resources they actually want b. resources can be accessed from any type of computer on the Internet. c. the usage model is based around what users want to achieve rather than specific SW and HW d. users do not have to pay any fixed costs

d. users do not have to pay any fixed costs