There are three main service models of cloud computing – Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS). There are clear differences between the three and what they can offer a business in terms of storage and resource pooling, but they can also interact with each other to form one comprehensive model of cloud computing.
aaS (Infrastructure as Service)
This is the most common service model of cloud computing as it offers the fundamental infrastructure of virtual servers, network, operating systems and data storage drives. It allows for the flexibility, reliability and scalability that many businesses seek with the cloud, and removes the need for hardware in the office. This makes it ideal for small and medium sized organisations looking for a cost-effective IT solution to support business growth. IaaS is a fully outsourced pay-for-use service and is available as a public, private or hybrid infrastructure.
PaaS (Platform-as-a-Service)
This is where cloud computing providers deploy the infrastructure and software framework, but businesses can develop and run their own applications. Web applications can be created quickly and easily via PaaS, and the service is flexible and robust enough to support them. PaaS solutions are scalable and ideal for business environments where multiple developers are working on a single project. It is also handy for situations where an existing data source (such as CRM tool) needs to be leveraged.
SaaS (Software as a Service)
This cloud computing solution involves the deployment of software over the internet to variousbusinesses who pay via subscription or a pay-per-use model. It is a valuable tool for CRM and for applications that need a lot of web or mobile access – such as mobile sales management software. SaaS is managed from a central location so businesses don’t have to worry about maintaining it themselves, and is ideal for short-term projects.
Answer:
The restaurant chain system consist of restaurant id, name, zipcode, manager id, menu list.
Manager; manager id, name, phone no, and store.
Menu; menu id, type, items and description.
Items; item id, price and description.
Explanation:
Please look at the attachment for the E. R diagram.
Answer: Hot sites
Explanation:
Virtualization in the cloud computing is the technology that are useful for the hot sites. It basically making the virtual image of the network devices so that it can be easily use multiple machine at the similar time.
There are various types of benefits of the virtualization in the cloud computing are as follow:
- It protect the system from the system failure.
- It is the cost effective technology.
- By using this we can easily transfer the data from the physical storage to the virtual server.
Driving is considered a privilege because you have to be a certain age to start driving and be able to drive by yourself legally. Driving can be dangerous if you are not a safe driver and if you do illegal things while behind the wheel. Driving is also a privilege because you have to be responsible when driving, because the people that are around you or with you, their lives are in your hands.
Your answer is: You need to carry the responsibility of being safe and not harming yourself or others.
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