Network - Introduction

Introduction to Network

Advantages of Network


1. (a) Explain what is meant by 'computer network'.


Computer Network is a group of two or more computer systems linked together.
A computer network is a group of computers and other computing hardware devices, e.g. printers, that are linked together through communication channels either ; cables or  Wi-Fi.


  (b) Explain what is meant by a 'local area network'.


The computers are connected close together in a limited area or on a single site. e.g. in the same building, house office or school building.


(c) Describe two ways in which the computers can communicate with each other.
To communicate computers can be physically connected by cables, over Wi-Fi, home routers with built in WAP functionally or even a wireless access point allowing wireless devices to connect to the network.


2. Describe the advantages to the users of creating a computer network rather than all users using stand-alone systems.
With a computer network each user does not need their own device connected directly to their computer as devices (printers) can be shared. Files can be shared across networks with other users, so there is no need for storage mediums (CD, DVD, USB, Memory stick). Also, Users are able to communicate and work collaboratively on the same document as well as sharing the same internet connection using a router which directs traffic to the correct users.
Users can access their own personal files from any computer giving greater flexibility.
If all data is stored centrally it makes it easier to back it up. A network provides greater security with usernames and passwords, monitoring the activity of each user but also prevents illegal installation of software. Having a computer network is usually cheaper as you buy licences for a network software rather than buying a version for each stand-alone computer.
3.Sugguest some disadvantages of creating and using a computer network.
Creating and using a computer network may be expensive with the cost of extra hardware and infrastructure. Sharing may create disadvantages, some users may use up too much bandwidth creating problems for other users. Malfunctions could cause loss of files and incompletion of work if data is stored on a central file, creating a higher risk of viruses spreading and easier for hackers as they don't have to search for files on all the stand-alone computers.