Certain features of fog computing differentiate it from cloud, Fog Computing is used for real time interactions but cannot totally replace cloud computing as it is preferred for high end batch processing. As the name suggests cloud system is placed at a distant where as the fog system is placed locally near to the end user. 2. LIMITATIONS AND CHALLENGES OF CLOUD COMPUTING In comparison to the previous traditional computing paradigms, Cloud computing provides various advantages to both service providers and users but it has also some limitations and challenges. Security and Privacy: Data security is major issues related with personal data and confidential data of organizations.
A grid can be a collection of machines, sometimes referred to as nodes, resources, members, donors, clients and hosts. They all contribute a combination of resources to the grid as a whole. Some resources may be used by all users of the grid, while others may have some restrictions. By focusing on grid resource sharing and coordination, managing capabilities, and attaining high efficiency, grid computing has become an important component of the computer industry. However, it is still in the developmental stage, and several issues and challenges remain to be addressed.
Moreover renewable energy provides clean and reliable energy sources which can be used in many applications in remote villages.  Smart grid is a modern electric power grid infrastructure for improved efficiency, reliability and safety, with smooth integration of renewable energy and alternative energy sources.  It heavily depend on communication in order to coordinate the generation, distribution, and consumption of energy. Even more so if distributed power plants based on renewable energies are taken into account. A communication system is the key component of the smart grid infrastructure.
Cloud computing represents a major change in how we store information and run applications. Instead of hosting apps and data on an individual desktop computer, everything is hosted in the "cloud"—an assemblage of computers and servers accessed via the Internet. This type of web-based computing frees you from the tyranny of desktop computing and opens up new forms of group collaboration. But as attractive as all that sounds, cloud computing isn't for everyone. Let's take a look at how the average end user can benefit from cloud computing—and why some end users should avoid these web-based applications, at least for now.
Individuals can also benefit from cloud computing, but some of the most sophisticated and advanced cloud computing services are aimed at enterprises. For example, big businesses and even smaller operations use specific cloud computing services to make different processes like supply-chain management, inventory handling, customer relationships and even production more efficient. An emerging picture of the difference between cloud computing and mobile computing involves the emergence of smart phone and tablets operating systems and, on the cloud end, new networking services that may serve these and other
3: How security can be implemented in grid and cloud computing? Answer: Security is the major concern of every user or service provider on the internet and so is true for cloud environment as well as in the Grid Computing its very crucial issue. Security issues and their counter measures 1. Mutli tenancy Multi tenancy means to offer services to more than one client. The best solution to cope with this problem is mutual client isolation.
Cloud Computing Cloud computing is a general term for the delivery of hosted services over the Internet. Cloud computing enables companies to consume compute resources as a utility, just like electricity rather than having to build and maintain computing infrastructures in-house. The advantages of cloud computing: 1. Achieve economies of scale – increase the amount output or productivity with fewer people. 2.
The usage of resource can be monitored, controlled and reported which provides transparency between both the consumer and server. • Cost: Cloud computing eliminates the capital expense of buying hardware and software and setting up and running on-site datacenters, the IT experts for managing the infrastructure. It adds up fast. • Speed: Most cloud computing services are provided self service and on demand, so even vast amounts of computing resources can be provisioned in minutes, typically with just a few mouse clicks, giving businesses a lot of flexibility and taking the pressure off capacity planning. • Global Scale: The benefits of cloud computing services include the ability to scale elastically.
This is because, cloud computing is a type of computing that relies on sharing computing resources rather than having local servers or personal devices to handle applications. In cloud computing, the word cloud or also known as “the cloud” is used as a metaphor for "the Internet," so the phrase cloud computing means "a type of Internet-based computing," where different services such as servers, storage and applications are delivered to an organization's computers and devices through the Internet. Thus, Cloud based Healthcare is the integration of cloud computing and health monitoring. The computing device enables the delivery of accurate medical information anytime anywhere by means of internet. Cloud based healthcare system consists of a computing device and number of sensors mounted on patient's body.
Abstract Cloud computing is a type of computing that relies on sharing computing resources rather than having local servers to handle applications. Cloud computing is a colloquial expression used to describe a variety of different types of computing concepts that involve a large number of computers and other resources connected through a real time communication network. Security issues have been the dominant barrier of the development and widespread use of cloud computing. There are three main challenges for building a secure and trustworthy cloud system: Outsourcing (don’t know where your servers are, how many copies of your data are kept and who all have access to your data physically and programmatically), Multi-tenancy (What type of