Cloud services model

Hello !

Cloud computing is offered in three different service models .
Infrastructure-as-a-Service (IaaS) 
Software-as-a-Service (SaaS)
Platform-as-a-Service (PaaS)

Infrastructure-as-a-Service (IaaS)

1) know as
2)main advantage
3)characteristics of Iaas
4)provide services
5)advantages of Iaas
6)disadvantages of Iaas

1) IaaS is also known as Hardware as a Service (IaaS). 

2) The main advantage of using IaaS is that it helps users to avoid the cost and complexity of purchasing and managing the physical servers.

3) Characteristics of IaaS
Automated administrative tasks.
Dynamic scaling.
Platform virtualization technology.
GUI and API-based access.
Internet connectivity.

4)IaaS provider provides the following services –
■Compute: Computing as a Service includes virtual central processing units and virtual main memory for the Vms that is provisioned to the end- users.
■Storage: IaaS provider provides back-end storage for storing files.

■Network: Network as a Service (NaaS) provides networking components such as routers, switches, and bridges for the Vms.
■Load balancers: It provides load balancing capability at the infrastructure layer.

Provides services

5)advantages of Iaas
■Pay for What You Use: Fees are computed via usage-based metrics
■Reduce Capital Expenditures: IaaS is typically a monthly operational expense
■Dynamically Scale: Rapidly add capacity in peak times and scale down as needed
■Increase Security: IaaS providers invest heavily in security technology and expertise
■Future-Proof: Access to state-of-the-art data center, hardware and operating systems
■Self-Service Provisioning: Access via simple internet connection
■Reallocate IT Resources: Free up IT staff for higher value projects
■Reduce Downtime: IaaS enables instant recovery from outages
■Boost Speed: Developers can begin projects once IaaS machines are provisioned
■Enable Innovation: Add new capabilities and leverage APIs
■Level the Playing Field: SMBs can compete with much larger firms

6)Disadvantages of IaaS:
■Lack of flexibility.
■Technical problems.
■Over Dependency.
■Upgrade & Maintenance.
■Virtualization Services & User-Privacy



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