What is Cloud Computing? - 1

a CCNA Cloud CLDFND 210-451 summary

  • The year 2009 saw a huge interest in cloud computing and the World financial crisis in 2007-2008 was the biggest influence in creating the cloud hype initially.

Fundamental milestones towards cloud computing in the history of computing,

YearMilestone
1957Mainframe Time-sharing
1961Computation as a public utility (John McCarthy)
1963Intergalactic Computer Network (JCR Licklider)
1969ARPANET
1973Virtual Machine (IBM)
Early 1980sPersonal computers
Mid 1990sWorld Wide Web(WWW) and Virtual Private Networks(VPNs)
1999Salesforce.com
2006Amazon Web Services
  • NIST's definition of Cloud Computing, "Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources (eg. networks, servers, storage, applications and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction".

  • Data center resources that can be offered through cloud computing are (DNS),

    • Data storage,
    • Network bandwidth
    • Server,
  • What gives cloud end users access to request resources?
    Service catalog in web portal
  • What is elasticity according to NIST definition of cloud computing?
    Cloud capabilities can be scaled rapidly out-ward and inward according to demand.
  • What defines best as the opposite of NIST essential characteristic "resource pooling" for cloud computing?
    Silos
  • The following options are direct benefit from cloud computing measured service characteristic? ART
    1. Automatic control,
    2. Resource optimization,
    3. Transparency between provider and consumer.
  • The following options represent devices that can utilize cloud resources,
    Personal computers, Tables, Mobile phones.
  • What is a tenant in the context of cloud computing?
    Any application that requires isolation from other tenants.
  • NIST classifies cloud implementations into?
    1. Deployment models (Public, Private, Hybrid)
    2. Service models (Iaas, Paas, Saas)