Networks

Mr Arthur

Aims of Lesson 1

1. Standalone/Network

2. LANs Examples/Uses/Transmission Media

3. WANS Examples/Uses/Transmission Media

Stand Alone/Networked

A Stand Alone computer system is a computer that is not connected to any other

A network is a linked set of computer systems that are capable of sharing programs, data and sending messages

Local Area Networks

A LAN is a network of computers connected over a small geographical area, usually inside the 1 building

Examples School LAN Network in a library

Uses Sharing files Sharing peripherals Email

Transmission Media Copper Wire, Fibre Optic and Wireless

Bandwidth = 10-100Mbps

Wide Area Networks

A WAN is a network of computers over a large geographical area, such as across a country or the world.

Examples The Internet Companies like the BBC communicating across the world

Uses Video-conferencing, use of e-mail, live chat Sharing Information - access to databases, E-commerce and entertainment

Transmission Media Fibre Optic, Microwave transmission and Satellite

Bandwidth = Dial Up 56Kbps/Broadband 20Mbps

Lesson Starter

1. What is the difference between a Standalone station and a Network?

2. Give 3 uses of a LAN

3. Give 2 transmission media that would be used with a WAN

Aims of Lesson 2

Last Lesson Introduce networks LANs WANS

Today’s Lesson

1. Client/Server

2. Advantages of Networks

Client Server Network A client-server network is where you store all files

centrally on a server and have many client stations that can access the files.

Advantages Increased security as each user needs to log in Different levels of access are available Flexible uses of station, you can log on to a number of clients

and access your files Backup copies are completed centrally

Disadvantages If the file server is down there is no access to data

Advantages of Networks

Share files – e.g. RM Shared Share peripherals – printers etc Communication improved – email, livechat Flexibility in using stations Password protect files Centralise backup

Lesson Starter

1. What is a Client Server network?

2. Give 3 advantages of setting up a network

3. Give 1 possible disadvantage

Aims of Lesson 3

Last Lesson Introduce networks LANs WANS Bandwidths Client Server Advantages of

Networks

Today’s Lesson

1. Email Features

2. Internet Theory

Email Features

Sending, reading and replying, Address book Mailing lists – creating groups for example

S1 Reg teachers Folders Signatures – Adding text that will always

appear in emails Attachments – adding a file to an email

World Wide Web A network of computers across the world

Webpages Pages written in Hyper Text Markup Language and saved on a

Webserver

Hyperlinks A piece of text that takes you to another page

Hotspots A link on a pixel

Browser A piece of software that displays webpages in the correct format e.g.

Internet Explorer, Firefox

Search Engine Where you use web crawler software to find items on the web. The

search engine displays an extract of the page and hyperlink

URL Uniform Resource Location = the address of the webpage

Aims of Lesson 5

Last Lesson Introduce networks LANs WANS Bandwidths Client Server Advantages of Networks Email Features Internet Theory

web pages, hyperlinks, browser, search engines

Today’s Lesson Economic Factors Computing Laws

DPA Copyright, Designs and

Patents Computer Misuse Act

Economic Factors Leading to Development of Networks

Falling Cost of Technology Shared Access to Expensive equipment Geographic spread of organisations Demand for up to date information

Computing Laws

Copyright Designs and Patents Act This makes it illegal to copy music, programs, movies

etc without the permission of the owner

Computer Misuse Makes it illegal to hack or spread viruses

Data Protection Act Controls the storage of personal information Data Controller must

Keep data secure Not sell it on Make sure it is accurate and up to date

Arrangements Description of the following features of LANs, WANs and the Internet: transmission

media, bandwidth, geographical spread and functions Description of the functions of a client and server on a network Description of the benefits of networks Description of the following features and functions of e-mail: e-mail address, sending,

reading, replying, setting up an address book, setting up mailing lists, setting up folders

Description of the following features of the World Wide Web: web pages, hyperlinks,

browser, search engines Description of the following economic factors which have led to the development of

computer networks: falling cost of telecommunication technologies and services, shared access to expensive equipment, geographic spread of organisations, demand for up-to date information

Description of the main features of the Computer Misuse Act, the Copyright Designs and Patents Act and the Data Protection Act