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Internet and Intranets
In this session our learning objectives are
Internet and Intranets
Internet and Intranets
Connection Methods
Hardware
Software
Connections
Browsers
Information and opportunities Internet and Intranets offer
Internet Security Risks
Laws and Guidelines that affect the use of IT.
The Internet
Internet and Intranets
The Internet is ?
A worldwide interconnection of computers and networks that use the protocol IP.
It allows for WWW, FTP, VoIP, Gaming, Filesharing, video, email.
Uses for the internet
Internet and Intranets
WWW or HTTP Hyper Text Transfer Protocol
Email – Outlook, Yahoo, Googlemail
FTP File Transfer Protocol
Gaming
Video On Demand
Voice Over IP – Telephone Services
File Sharing
INTRANETS
Internet and Intranets
What is an intranet ?
It is an internal website that is setup internally for companies and can be accessed by employees for the purpose of standard documents or information and many items of information and data.
INTERNAL WEBSITE WITHIN A COMPANY ACCESSED BY EMPLOYEES
Connection to the internet - Hardware
Internet and Intranets
What do we need to connect to the internet ?
• Computer or smart phone• Network hub if part of a network• A wireless enabled Router if using WiFi• ADSL or cable modem• An Internet Service Provider
MODEM
Internet and Intranets
MODulator-DEModulator
Converts digital 1’s and 0’s
Into analogue waves.
Allows computers to talk over phone lines.
It connects directly to the communications line.
It is always the first device connected to the communications line.
Internet and Intranets
MODEM
FM Frequency Modulation
AM Amplitude Modulation
Modulate a carrier signal into 1’s and 0’s.
FM How Often
AM Loudness/Amplification
ROUTER
Internet and Intranets
A router is a device that has an IP address. Computers can then connect to it using this address. It then forward links onto another communications device that can access the internet.
SWITCH
Internet and Intranets
A switch is used to connect different network segments.
A network segment is a set of computers all connected together.
Like an intelligent hub.
A Network HUB
Internet and Intranets
A device that connects computers together and can link them all on to another device.
HARDWARE
Internet and Intranets
Order of devices
A modem is always first. It is the connection to the telephone or data communications line.
Routers, hubs and switches can be plugged into each other in any direction. But usually in the order of Router, Switch, Hub.
Telephone or Data Communications Lines
Internet and Intranets
To connect to the internet you need a link to it.
This link can be
BROADBAND
ADSL or DSL
DIAL UP
ISDN
Types of Line
Internet and Intranets
BROADBAND – Handles a broad band of frequencies (TV, Voice, Data)
DSL is Digital subscribers line (Voice and data)
DIAL-UP is maximum of 56k (Data)
ISDN is Integrated Services Digital Network (Voice, Data, Video)
Other ways to connect to the internet (HARDWARE)
Internet and Intranets
What is there ?
• Smart phone using 3G or 4g• USB ADSL dongle that connects to a service provider network
ISP – Internet Service Providers
Internet and Intranets
What are they ?
Who are they ?
What do they do ?An ISP sells Internet access to companies
and individuals.It provides web servers which connect to the Internet.An ISP will provide it’s customers with a wide range of services…
Cable Television/Telephone servicesBandwidth options.Email service.Web Hosting.Online and Telephone assistance.
Software On The Internet
Internet and Intranets
What software can you think of do you use to access services on the internet ?
BROWSERS
Lime Wire – File
Sharing
SKYPE
GAMING
FTP – File Transfer Protocol SKYPE
OUTLOOK
FIREWALL
STOP STOP
Complete questionnaire 1.1Complete questionnaire 1.1
BROWSERS
Internet and Intranets
Browsers – These allow you to utilise HTTP and HTTPS to view the WorldWideWeb.
What browsers are there ?
Internet Explorer
Mozilla Firefox
Netscape Navigator
Opera
FTP
Internet and IntranetsFile Transfer Protocol is used to access websites via a
different door to download files.
Internet and Intranets
Software that composes, sends and receives email
SKYPE
Internet and Intranets
• Telephone calls can be made over the internet using VOIP
• VOIP is ‘Voice Over Internet Protocol’
• A popular service that does this is SKYPE
• This also includes video calls if a web cam is available.
GAMING
Internet and Intranets
Accessing games
FILESHARING
Internet and Intranets
• It is possible to share files over the internet• DropBox is a popular service where files can be uploaded to let others download them
BROWSER FACILITIES OR FUNCTIONS
Internet and Intranets
What facilities do browsers have available to use ?
Types of Line
Internet and Intranets
Browsers
BROWSER FACILITIES
Internet and Intranets
Navigation, forward and back.
Home
Tabbed browsing
Stop
Refresh
WWW Address bar
Favourites
Windows Search
Access to Search Engines and Webpages
HyperLinks – HyperText
Browser History
RECAP
Internet and Intranets
In this session we have learnt about
Internet and its uses
Intranets
Connection hardware – Modems Switches Routers Hubs
Connection Lines – ADSL DSL ISDN DIAL-UP
Other hardware methods of connecting Dongles PDAs
ISP – Internet Service Providers
Software used to access the services on the internet Email Browsers FTP
STOP STOP
Complete questionnaire 1.2Complete questionnaire 1.2
Internet Security Risks ?
Internet and Intranets
What risks are there in using the internet
Downloading
Entering Personal Details
Online Banking
Buying Items Off The Internet
Sending Emails
Uploading Files
RISKS !!!
Internet and Intranets
Viruses, attack, hacking, identity theft, fraud, getting passwords, stealing bank details, intercepting emails, theft of data, posting unwanted videos, posting unwanted text………..
RISK PREVENTION
Internet and Intranets
What do you need to do to minimise some or all of the risk when accessing the internet ?
FIREWALL
VIRUS SCANNER
INSTALL ADWARE AND MALWARE SCANNERS
BE AWARE OF EMAIL SCAMS
BE CAREFUL WHEN USING PAYMENT SITES
BE CAREFUL DOWNLOADING AND UPLOADING
USE COMPLEX PASSWORDS
RECAP
Internet and Intranets
In this session we have learnt about
Internet Security Risks
Attack, Viruses, Hacking, Fraud, Theft, Email scams
What Do These Risks Involve
Viruses can scan your machine and delete your data or your passwords.
Email scams can steal your personal details
Risk prevention
Firewalls Virus scanners Malware Adware Be aware of what sites you visit and the files you download.
STOP STOP
Complete questionnaire 1.4Complete questionnaire 1.4
LAWS AND GUIDELINES ON THE USE OF IT
Internet and Intranets
It is going to be your task to find out what laws and guidelines there are to using IT.
You will need to produce worksheets outlining the main headings of guidelines and laws that exist for the day to day use of computers and IT.
http://www.bbc.co.uk/guidelines/editorialguidelines/onguide/thelaw/lawontheinterne.shtml
3 Major Headings For ICT and The Law
Internet and Intranets
Data Protection Act (1998)
Computer Misuse Act (1990)
Copyright, Design and Patents Act (1988)
Some Things To Be Aware Of
Internet and Intranets
Copyright
Protecion of Use of Information
Sharing Information
Obscene Publications
Internet Privacy
Data Privacy
CD’s DVD’s Films Filesharing
Fraud
Posting Unwanted files and photos
CCTV
Fraudulent Use of Data
Access to your data
Hacking and Accessing Information
Planting viruses and Malware
Deleting Files
Blackmail
STOP STOP
Complete questionnaire 1.5Complete questionnaire 1.5
Laws and GuidelinesLaws and Guidelines
Health and Safety
When Using ICT
Internet and Intranets
There are rules and guidelines that govern your health and safety when
using ICT.
Internet and Intranets
STOP STOP
Complete questionnaire 1.5Complete questionnaire 1.5
Health and SafetyHealth and Safety
Information and Opportunities Available Using the Internet.
Internet and Intranets
Email FTP HTTP HTML
Job Searches research MP3 Video Telephone
Downloads Software Games Images
STOP STOP
Complete questionnaire 1.3Complete questionnaire 1.3
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