COM-425 Week 7

Cloud computing is one of the most important elements in computing today.  It is essentially when a user can access  applications or store files on a server using the internet.  This is where the term ‘cloud’ comes from.  There are 3 different types of cloud computing, virtual, software and network storage.

Virtual cloud computing is when a user can access web applications or services via a third party who will share their resources with the user.  An example of this would be Amazon EC2.  This application would mainly be used by businesses or organisations.  The application provides the user with all resources needed to save software, libraries and data on their server.  A server can be created within minutes, allowing them to quickly scale capacity, both up and down, as their requirements change.  This means that the company/organisation do not have to build their own network saving time and money.  This application also gives the user the same privileges they would have in a normal network.

Software cloud computing is when an application is hosted on the internet for businesses and organisations to use.  These can be designed and developed for some companies particular needs.  An example of this would be Google Apps.  Google have created applications for business use, school use and personal use.  In order to use an application, a user must create an account.  Once registered, he/she can then use all applications offered by Google.  This means the user will not have to download software in order to use the applications.  Another example of this is MSN Hotmail. The same steps are taken to create an account.  Once registered, the user can use MSN application to send and receive e-mails.  All e-mails will then be saved on the MSN web server.

Network storage is when a user can back-up their data using an internet provider. This allows the user to save files on an internet server as back-up.  The advantages to this service are that a user will not have to use CD’s, external hard drives, etc.  This will help save space and time.  Another advantage is that a user can log on to any PC and to access their files.  Businesses can also use this form of cloud computing to back-up particular documents they wish to store.

One advantage of cloud computing is that service providers are responsible for installing and maintaining applications used within the cloud.  This is preferred by some but a disadvantage of this is that a customer does not have direct control over the system and are highly dependant on the provider.  Cloud computing systems are often designed to only charge the customer for what resources they use.  This will be preferred by some as it can and often saves money from the conventional network system although other customers prefer a flat rate to help predict annual costs.  One disadvantage to cloud computing us that information and data is sent over the internet and stored on a third parties server.  This risks the privacy of particular material and they are reliant on the provider not to leek and information.

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