Introduction to Computer Networking

Computer network is basically a virtual telecommunications community which permits the nodes to allocate sources. A computer network have to be a set of or more than two computers, printers & nodes with the intention to transmit or obtain facts through stressed out media like copper cable or optic cable or wireless media like wifi.

Source
The best instance of a computer network is the internet. A computer network doesn’t suggest a device which has sinlge manipulate unit related with the alternative structures which behave as its slaves.

Furthermore, it should be able to meet certain standards as referred to underneath:

• Performance
• Reliability
• Security

Performance:

The network performance may be computed with the aid of measuring the transit time and reaction time that is defined as follows:

Source

Transit time:

It is the time taken by facts to travel from one supply factor to another spot factor.

Response time:

It is the time which has been elapsed among the query & reaction.

Reliability:

Reliability is checked by way of measuring community disasters. The better the number of screw ups, the lesser can be the reliability.

Security:

Security is described as how our records is included from undesirable users.

When data is flowing in a network, it is going through numerous community layers. Subsequently, records may be leaked through undesirable users if traced. Thus, statistics security is the most crucial part of computer networks.

An excellent network is the only which is tremendously secured and clean to get entry to so that you can without difficulty share records at the same network without any loopholes.

Source

Basic Conversation model

Components of Information Conversation:

Message:

It's far the information to be delivered.
Sender: sender is the individual that is sending the message.

Receiver:

Receiver is the individual to whom the message is being sent.

Medium:

It's far the medium through which the message is despatched. as an instance, a modem.

Protocol:

Those are a set of policies which govern the facts conversation.

Other elements of pc networks:

It helps all sorts of records and messages which can be in the form of voice, video or textual content.

It is very speedy and takes only a fragment of second for conversation of statistics. It's miles a rather secured medium of verbal exchange, very reluctant in value & superbly efficient and thereby is easy to get right of entry to as nicely.

Source

Uses of Computer Networking

Communication among one computer to every other computer. Exchange of statistics among diverse users of the same platform.
Trade of luxurious software and database.
Sharing of data over wan.
Used for sharing of hardware gadgets in addition to software program together with printers, modems, hubs and many others.
Computer networks each in our everyday existence and for enterprise purposes and we are able to also see how it'll deliver revolution in those fields.

Aid sharing:

The sole goal is to make all software and hardware device specifically, printers and switches accessible to absolutely everyone at the community irrespective of the bodily area of the sender or receiver.
#.Server-purchaser model:

Believe a model in which a company’s statistics is saved on a few clever pc which is exceedingly secured with firewalls and is situated within the business enterprise office. Now, an employee of the firm needs to access information remotely along with his easy computer.

On this model, the employee’s computing device will be the consumer and the computer located at the office can be the server.

Conversation Medium:

A computer network provides a robust setup of verbal exchange medium many of the personnel in an workplace.

Almost every organisation (that has or more computer systems) may be employing an e-mail (email) capability which all the personnel will usually use for a extremely good change of daily conversation.

E-trade:

In recent times, buying online with the aid of sitting on the comfort of our home is on-trend.
Doing corporations with the purchasers over the internet could be very handy and it saves time too. Airways, bookstores, on line shopping, hotel booking, on line buying and selling, and tune carriers experience that clients just like the ease of buying from home.