How to Exploit the Vulnerability of a Missing Patch Using Metasploit
Network Administration: New User Creation
Wireless Network Administration: Adding a BlackBerry User

Cloud Computing Delivery Models

The following figure shows the various types of cloud services as three distinct models: Infrastructure as a Service, Platform as a Service, and Software as a Service. In reality, the lines between the different delivery models are often blurred. For example, a Software as a Service (SaaS) vendor might decide to offer separate infrastructure services to customers.

  • Infrastructure as a Service is the delivery of computer hardware (servers, networking technology, storage, and data center space) as a service. It may also include the delivery of operating systems and virtualization technology to manage the resources.

  • Platform as a Service includes the delivery of more than just infrastructure. It delivers what you might call a solution stack — an integrated set of software that provides everything a developer needs to build an application — for both software development and runtime.

  • Software as a Service is the delivery of business applications designed for a specific purpose. Software as a Service comes in two distinct modes:

    • Simple multi-tenancy: Each customer has its own resources that are segregated from those of other customers. It amounts to a relatively inefficient form of multi-tenancy.

    • Fine-grain multi-tenancy: This offers the same level of segregation but is far more efficient. All resources are shared, but customer data and access capabilities are segregated within the application.

blog comments powered by Disqus
How to Use the New Share Wizard
Network Administration: Roles and Features in Windows Server
Network Administration: Creating an FTP Site
Load Data into Amazon Web Services Buckets
Network Administration: Performance Log Creation