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Core 1 > 4.1 Cloud Computing and 2.2 Networking Hardware > Flashcards

4.1 Cloud Computing and 2.2 Networking Hardware Flashcards

1
Q

What is cloud computing?

A

The practice of using a network of remote servers hosted on the Internet.

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2
Q

List some characteristics of the cloud (there are nine in total).

A
  • High availability
  • Scalability
  • Vertical scaling
  • Horizontal scaling
  • Rapid elasticity
  • Metered utilisation
  • Measured services
  • Shared resources
  • File synchronisation
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3
Q

What is the definition of availability?

A

Percentage of uptime versus downtime.

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4
Q

Define scalability.

A

Ability to increase the number of items in a system at a linear rate or less than a linear rate

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5
Q

Define vertical scaling.

A

Increasing the power of the existing resources in the working
environment

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6
Q

Define horizontal scaling.

A

Adding additional resources to help handle the extra load being
experienced

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7
Q

Define rapid elasticity.

A

Elasticity is the system’s ability to handle changes to demand in
real time

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8
Q

Define metered utilisation.

A

Being charged for a service on a pay per use basis (most services in the cloud are done this way)

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9
Q

Define measured services.

A

Charging is based upon the actual usage of the service being consumed.

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10
Q

What is shared resources?

A
  • Pooling together all the hardware to make a cloud provider
  • The ability to minimise the costs by putting VMs on other servers
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11
Q

What is file synchronisation?

A

The ability to store data that can spread to other places depending on the configuration.

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12
Q

List the cloud deployment models (there should be six).

A
  • Public cloud
  • Private cloud
  • Hybrid cloud
  • Community cloud
  • Multitenancy
  • Single-tenancy
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13
Q

How does a public cloud work?

A

Systems and users interact with devices on public networks, such as the internet and other clouds.

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14
Q

Who can access a private cloud?

A

Systems and users that only have access with other devices inside the system.

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15
Q

What is a hybrid cloud?

A

A combination of the public and private clouds.

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16
Q

What is a community cloud?

A

A collaborative effort where infrastructure is shared between several organisations from a specific community with common concerns.

17
Q

Define multitenancy.

A

The ability for customers to share computing resources in a public or private cloud.

18
Q

Define single-tenancy.

A

A particular resource assigned to a single organisation.

19
Q

What are the two cloud service models (with a brief definition)?

A

On-premise solution: All hardware, software and personnel are procured and controlled by the organisation
Hosted solution: Third-party service provider that provides all hardware and facilities needed to maintain a cloud solution

20
Q

What is Virtual Desktop Infrastructure (VDI)?

A

Desktop OSs within a virtualised environment hosted by a centralised server or server farm.

21
Q

What is a centralised model in VDI?

A

All desktop instances hosted on a single server/server farm

22
Q

What does the server do in VDI?

A

Performs all the application processing and data storage

23
Q

What is the hosted model/Desktop as a Service?

A

Maintained by a service provider and provided to the end user as a service

24
Q

What is a remote virtual desktop model?

A

Desktop image copied to local machine prior to being utilised by end user

25
Q

Name three cloud storage services.

A
  • Cloud storage application
  • File synchronisation
  • Content delivery network (CDN)
26
Q

What is CDN (as a cloud storage service)?

A

A network of servers that locates the nearest server to minimise delay or download time

27
Q

What does software-defined networking (SDN) do?

A

Enables the network to be intelligently and centrally controlled/programmed, using software applications.

28
Q

What does the OSI application layer focus on?

A

The communication resource requests or information about the network as a whole

29
Q

What does the control layer do?

A

Uses the information from the applications and decides how to route a data packet on the network

30
Q

What is a key feature of the infrastructure layer?

A

It contains the network devices that receive information about where to move the data

31
Q

What is the management plane used for?

A
  • Monitoring traffic conditions and the status of the network
  • Providing a layer of abstraction between the devices and the control and data flow that happen on the network

Core 1 (27 decks)

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