Most of the time, the discussions regarding computer networks are a jumble of acronyms, but here we are mentioning the basic insights of introduction to computer networks for your easy understanding. Computer Network is basically a telecommunication channel through which the data is shared locally or globally. This is why it is also called data network. To understand the concept, there are some definitions that should be known:
Node – a device capable of sending/receiving data to and from other nodes
Network – Nodes connected via media link
Communication Channels – the media links that connect these devices
Computer network typically includes a set of computers or other electronic equipment and all of them are connected together for the proper communication. The best and most commonly used instance of computer networks is the internet. The others can be the network in school or LAN connecting computers with each other and may others.
When learning about introduction to computer networks, it should be known that a network needs to meet certain criteria in order to be efficient.
These criteria are measured in following ways:
Transit Time – Time consumed by a message to travel from sender to receiver.
Response Time – Time elapsed between the inquiry and response.
Other than these two, the performance can also be measured by number of users, efficiency of software and most importantly, the capability of connected hardware.
The reliability of the computer network decides the frequency of network failure. If a network fails more often, it is less reliable.
The security of the computer network refers towards the safety and protection of the data from the unauthorized access of the attacker. Security is important because the data has to pass many layers when it is travelling through a computer network and it is fairly possible for it to be traced. It is also an essential characteristic for Networks.
Properties of Good Network
A computer network can be considered as functional and efficient if it has following properties.
It should allow the users to communicate with each other; the examples can be chat rooms, emails, video conferencing and such.
The resources that are shared in the computer network, such as printers, are accessible by all the other nodes in the network.
The users which are authorized are allowed in order to share data in form of files and others using network.
It is the data sharing that occurs between 2 or more devices using some sort of a medium. The used medium is the wire cable and the exchange of data occurs in the form of 0’s & 1’s. There are two major categories of communication, namely:
This is the type of communication that occurs when the devices of the network are in the same geographical area, such as in the same building or direct communication between individuals.
This is the type of communication that occurs when the devices at a distance. The effectiveness is measured through the delivery efficiency, timeliness, and accuracy.
These are the basics you need to know about the introduction to computer networks as a beginner and newbie. We hope that now you are capable of grabbing the main idea of computer networks.