Computer Networks and Uses | Readstall

Computer Networks and Uses

07-02-19 P Rajasekhar 0 comment

Let’s look at the Computer Networks basics,

Computer: Computer is a device which can be used to automate/operate the things by applying some logical and programmable skills.

Communication link: Two or more devices are connected by a communication link.

Network: Connecting multiple resources/devices with the help of communication links forms a Network.

Signal: A signal is a kind of Electromagnetic wave, signals are of two types namely,

  • Analogue signals: A signal that changes continuously.                                                                                            Eg: voltage fluctuations.
  • Digital signals: The signal generates in the form of bits. i.e  0’s and 1’s.                                                              In this context, 0 means low, 1 means high.

Data flow: The transformation of data from one place to another place is called Data flow.

       The data flows  are of two kinds, namely:

  • Half duplex:Here the communication takes place at one way(uni-directional) i.e after successful receiving of sender’s data by the receiver, receiver may responds according to the sender.

                    Eg:  walkie-talkie.

  • Full duplex:Here the communication is two way communication (bi-directional) i.e at a time the sender and receiver interact with each other.

                    Eg: Telephone

Some of the networks experiments, facts and their results says that an effective network has to obey following  criteria,

  1. Performance: Network services should  maintain quality processes. If there is any data lost, it can be identified by using some of the error checking mechanisms.
  2. Reliability: It describes that how fast the network will be responds if any data lost in the network area. It should be available at any time i.e 24*7 operations.
  1. Security: For better security the sender and receiver should authenticate with the network system. During data transmission time no data lost is applicable.
  1. Jitter: The mean arrival time of the data contained packets is called Jitter. The Jitter should be always less.

Uses of Computer Networks:

       The resources which are interconnected with each other are called Network. With the connected resources the data is transferred from one place to another place through the connected resources.

The following are the uses Computer networks;

  • Business Applications
  • Home Applications
  • Mobile Applications

 

Business Applications:

Here is list of Business applications,

  • Resource Sharing: In the organizations the resources utilization need to be done properly, it is possible with the help of networks. Those resources are connected with each other and forms a shareable network.
  • Client Server Model: In this model the server system is placed at one place and at the same times the client at another place, client will request to server system with the help of network. So here the client is served by the server.
  • E-commerce: The internet networks provides most of easy commerce business through the sharing of networks like shopping, airlines, bus reservation system etc.

Home Applications:

The following are the reasons to implement network implementations into the home applications,

  • Access to remote information: Resource utilization by the remote access. This reduces the risk and cost.
  • Person to person communication(peer to peer communication): In peer to peer communication there is no server to store and forward to client. So this communication is used in the email services  and for instance messaging.

 

Mobile(movable) Applications:

Mobile applications are of two types:

  • Wired Network: The devices are connected with the wires so here exist physical communication of devices.

Eg: Ethernet, desktop computers etc.

  • Wireless Network: The devices are connected without physical existence.

Eg: Hotspot, NFS (Near-Field Communication), Bluetooth etc.

The first wireless networks constructed for cell phones and it has problems: some of they are

  1. microscopic screens,
  2. low bandwidth and
  3. poor service etc.

From the above applications, it is clear that the data is transferred from one device to other devices easily, that’s what we need in the present environment. Since year 2000’s the networks are came into picture widely. Slowly the Networks are become very popular around world.

 

 

 

 

 

 

                            

 



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