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Senin, 28 April 2014

Cloud Computing


1.      Jelaskan gambaran umum dari cloud computing ?
Jawab : Cloud computing in general can be portrayed as a synonym for distributed computing over a network, with the ability to run a program or application on many connected computers at the same time. It specifically refers to a computing hardware machine or group of computing hardware machines commonly referred as a server connected through a communication network such as the Internet, an intranet, a local area network (LAN) or wide area network (WAN) and individual users or user who have permission to access the server can use the server's processing power for their individual computing needs like to run an application, store data or any other computing need.

2.     Manfaat cloud computing
Jawab : *Scalability, cloud computing is with us to add to our data storage capacity without having to purchase additional equipment , such as hard drives , etc. . We simply add the capacity provided by the cloud computing service providers .
*Accessibility , ie we can access data whenever and wherever we are , as long as we are connected to the Internet , making it easier for us to access the data when important .
*Security , we can be assured that the data security of its cloud computing service provider , so for IT based company , the data can be stored securely in the cloud computing provider . It also reduces the cost required to secure corporate data .
*Creation , ie the user can do / develop their creations or projects without having to submit their projects directly to the company , but the user can send it through the cloud computing service providers .
 *Anxiety , when a natural disaster strikes our proprietary data stored safely in the cloud even though we damaged hard drive or gadget

3.     Prinsip kerja cloud computing
Jawab : With Cloud Computing is no longer a local computer should run the heavy computational work required to run the application , no need to install a software package for every computer , we only perform the installation of the operating system on application . Computer networks that make up the cloud ( Internet ) handles them instead . This server will be running all applications ranging from e - mail , word processing , to complex data analysis programs . When users access the cloud ( internet ) for a popular website , many things can happen . Users of Internet Protocol ( IP ) for example can be used to determine where the user is located ( geolocation ) . Domain Name System ( DNS ) services can then redirect the user to a server cluster that is close to the users so that the site can be accessed quickly and in their local language . The user is not logged into the server , but they login to their services using a session id or cookie that has been obtained is stored in their browser . What users see in the browser usually comes from a web server .
4.     Karakteristiknya
Jawab : Cloud computing exhibits the following key characteristics:
  • Agility improves with users' ability to re-provision technological infrastructure resources.
  • Application programming interface (API) accessibility to software that enables machines to interact with cloud software in the same way that a traditional user interface (e.g., a computer desktop) facilitates interaction between humans and computers. Cloud computing systems typically use Representational State Transfer (REST)-based APIs.
  • Cost: cloud providers claim that computing costs reduce. A public-cloud delivery model converts capital expenditure to operational expenditure. This purportedly lowers barriers to entry, as infrastructure is typically provided by a third party and does not need to be purchased for one-time or infrequent intensive computing tasks. Pricing on a utility computing basis is fine-grained, with usage-based options and fewer IT skills are required for implementation (in-house). The e-FISCAL project's state-of-the-art repository contains several articles looking into cost aspects in more detail, most of them concluding that costs savings depend on the type of activities supported and the type of infrastructure available in-house.
  • Device and location independence enable users to access systems using a web browser regardless of their location or what device they use (e.g., PC, mobile phone). As infrastructure is off-site (typically provided by a third-party) and accessed via the Internet, users can connect from anywhere.
  • Virtualization technology allows sharing of servers and storage devices and increased utilization. Applications can be easily migrated from one physical server to another.
  • Multitenancy enables sharing of resources and costs across a large pool of users thus allowing for:
    • centralization of infrastructure in locations with lower costs (such as real estate, electricity, etc.)
    • peak-load capacity increases (users need not engineer for highest possible load-levels)
    • utilisation and efficiency improvements for systems that are often only 10–20% utilised.
  • Reliability improves with the use of multiple redundant sites, which makes well-designed cloud computing suitable for business continuity and disaster recovery.
  • Scalability and elasticity via dynamic ("on-demand") provisioning of resources on a fine-grained, self-service basis in near real-time[45](Note, the VM startup time varies by VM type, location, os and cloud providers), without users having to engineer for peak loads.
  • Performance is monitored, and consistent and loosely coupled architectures are constructed using web services as the system interface.
  • Security can improve due to centralization of data, increased security-focused resources, etc., but concerns can persist about loss of control over certain sensitive data, and the lack of security for stored kernels. Security is often as good as or better than other traditional systems, in part because providers are able to devote resources to solving security issues that many customers cannot afford to tackle. However, the complexity of security is greatly increased when data is distributed over a wider area or over a greater number of devices, as well as in multi-tenant systems shared by unrelated users. In addition, user access to security audit logs may be difficult or impossible. Private cloud installations are in part motivated by users' desire to retain control over the infrastructure and avoid losing control of information security.
  • Maintenance of cloud computing applications is easier, because they do not need to be installed on each user's computer and can be accessed from different places.

5.     Bagaimana tingkat keamanannya
Jawab :
*Data Protection
When we 've decided to adoption or migration of data to the cloud , which is considered is how the cloud service providers provide protection against our data . By what method they are doing so that we are sure the data protection safe , but it is also the location of data storage is an important consideration which is to do with the Data Center . Ensured that they make data centers already certified / audited , for example, the location of the earthquake -free , my source of electricity standard 3 layers etc. .
* Security Control
After our data strongly protected , next is how the security of access to our data (role ) , what is the procedure so that only those who are entitled to access our data . Here teramsuk access to the workers / employees in the service provider to our data .
*Compliance
Standards are applied to Cloud Computing service providers , eg for data security using ISO 27001 , ITIL service provision wear , COBIT , Cloud Security Alliance , including an international regulatory and government . So if there is a breach of the settlement will be easy
*Multi - tenancy
One is the nature of Cloud computing resource sharing , well how when there are other tenants are committing fraud or leaking , what is the impact to our data there , it should be considered . Because physically , our data can be present in the same physical medium to another .
*Security Governance
 It is more to governance policy of the service provider or we as users of the service , should be spelled out and its governance paka what should be defined here .

6.     Konsep cara kerjanya
Jawab : In a cloud computing system , there's a significant workload shift . Local computers no longer have to do all the heavy lifting during use . This cloud computer network that handles them instead . Hardware and software on the user's side decrease . The only case in which a computer user must be able to run the software interface is cloud computing system , which is simple as a Web browser , and the cloud network will take care of the rest . What is cloud computingAda good chance if you are already using some form of cloud computing . If you have an e - mail with a Web services - based e - mail such as Hotmail , Yahoo! Mail or Gmail , then you already have some experience with cloud computing . Instead of running an e- mail program on your computer , you can log in to the e-mail account remotely your site / can be controlled from elsewhere . The software and storage for your account does not exist on your computer - but the service and cloud computing .


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Nama : Priyanti Kusuma Sari
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