FREE Lesson Note on COMPUTER SCIENCE for SS3 MS-WORD

This COMPUTER SCIENCE Lesson Note was pulled from our book ( Lesson Note on COMPUTER SCIENCE for SS3 MS-WORD ); Compiled to serve as reference material to help teachers draw out their lesson plan easier, saving you valuable time to focus on the core job of teaching.

The Lesson notes are based on the current NERDC curriculum (UBE compliant)

This Lesson Note on COMPUTER SCIENCE Covers The Following Topics

NETWORKING
NETWORK TOPOLOGY, DEVICES AND INTERFACE
CABLES AND CONNECTORS
INTRODUCTION OF WORLD WIDE WEB
DATABASE & DATABASE
ORGANISATION
GRAPHIC INTRODUCTION TO COREL DRAW
BASIC PROGRAMMING

WEEK 1

Definition of Networking
Types of Networking

Networking

Networking is the construction, design, and use of a network, including the physical (cabling, hub, bridge, switch, router, and so forth), the selection and use of telecommunication protocol and computer software for using and managing the network, and the establishment of operation policies and procedures related to the network.

A computer network can be defined as a collection of interconnected computers in such a way that they share resources. A computer system only referred to a group of the computers and hardware components interconnected by communicating channels that allow sharing of resources and information. It is the practice of interfacing two or more computing devices with each other for the purpose of sharing data. Computer networks are built with a combination of hardware and software. Technically, If at least one process in one computer can send or receive data to/from at least one process residing on a remote computer, then two machines are said to be a network.

A computer network is a set of connected computers. Computers on a network are called nodes. The connection between computers can be done via cabling, most commonly the Ethernet cable, or wirelessly through radio waves. Connected computers can share resources, like access to the Internet, printers, file servers, and others. A network is a multipurpose connection, which allows a single computer to do more.

It is this network that evolved to become what we now call the internet.

Networks are used to:

Facilitate communication via email, video conferencing, instant messaging, etc.
Enable multiple users to share a single hardware device like a printer or scanner
Enable file sharing across the network
Allow for the sharing of software or operating programs on remote systems
Make information easier to access and maintain among network users

Types of Networks

There are many types of networks, including:

Local Area Networks (LAN)
Personal Area Networks (PAN)
Home Area Networks (HAN)
Wide Area Networks (WAN)
Campus Networks
Metropolitan Area Networks (MAN)
Enterprise Private Networks
Internetworks
Backbone Networks (BBN)
Global Area Networks (GAN)
The Internet

There are several different types of computer networks. Computer networks can be characterized by their size as well as their purpose.

The size of a network can be expressed by the geographic area they occupy and the number of computers that are part of the network. Networks can cover anything from a handful of devices within a single room to millions of devices spread across the entire globe

Some of the different networks based on size are:

Personal area network, or PAN
Local area network, or LAN
Metropolitan area network, or MAN
Wide area network, or WAN

In terms of purpose, many networks can be considered general purpose, which means they are used for everything from sending files to a printer to accessing the Internet. Some types of networks, however, serve a very particular purpose. Some of the different networks based on their main purpose are: