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Computer networks can be defined as the exchange of network packets between computing machines across the world with the help of data lines like wire cables, optical fibers, etc. Advantages of computer networks Data is easy to backup as all the data is stored on the file server. Sharing devices such as printers save money Files are easily be shared between users Networks users can communicate by email and instant messenger. Security is good – users cannot see other user’s files unlike on stand-alone machines. Site ( software ) licences are likely to be cheaper than buying several standalone licences. Disadvantages of computer networks There is a danger of hacking, particularly with wide area networks. Security procedures are needed to prevent such abuse, eg. firewall. Purchasing the network cabling and file servers can be expensive. Managing a large network is complicated, requires training and a network manager usually needs to be employed. Viruse...

Computer architecture consists of rules and methods or procedures which describe the implementation, functionality of the computer systems. Architecture is built as per the user’s needs by taking care of the economic and financial constraints.  Computer architecture multiple tasks : 1. Direct memory access (DMA): Direct memory access is a capability provided by some computer bus architectures that allows data to be sent directly from an attached device (such as a disk drive) to the memory. sometimes there is need for some devices to access the main memory of the main system without going through the central processing unit of the same, this can be done with help of direct memory access where the device directly is able to access the random – access memory of the system.  2. Virtual memory: Virtual memory is a valuable concept in computer architecture that allows you to run large sophisticated programs on a computer even if it has a relatively small amount of RAM. W...

Cloud computing is the on-demand delivery of IT resources over the internet with pay-as-you-go pricing. Instead of buying, owning, and maintaining physical data centres and servers, you can access technology services, such as computing power, storage, and databases on an as-needed basis from a cloud provider.  Following are the characteristics of Cloud Computing: 1.    Availability: The capabilities of the cloud can be modified as per the use and can be extended a lot. It analyzes the storage usage and allows the user to buy extra cloud storage if needed for a very small amount.  2.    Easy Maintenance: the servers are easily maintained and the downtime is very low and even in some cases, there is no downtime. Cloud computing comes up with an update every time by gradually making it better. The updates are more compatible with the devices and perform faster than older ones along with the bugs which are fixed. 3.    Pay as you go: In ...

Data Mining is a process that is useful for the discovery of informative and analyzing the understanding of the aspects of different elements. The term data is referred to here as a raw collection of stats and details, which is not sorted. The same data if it organized and sorted then it turns out to be information, which can be used by us in various ways. This extraction of information from the raw data is another form of data mining. The key properties of data mining are : Focus on large data sets and databases Automatic discovery of patterns  Creation of actionable information  Prediction of likely outcomes  Data Mining Applications:  Data mining is mostly used by many of the big giants in the IT sector and also some small industries by making use of their own techniques. Some of the popular domains are : 1.    Corporate analysis & Risk management – The following mentioned are the various fields of the corporate sector where the data...