Transcript Internet and Intranets

Internet and Intranets
Internet and Intranets
In this session our learning objectives are
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.
Internet and Intranets
The Internet
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.
Internet and Intranets
Uses for the internet
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
Internet and Intranets
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
Internet and Intranets
Connection to the internet - Hardware
What do we need to connect to the internet ?
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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
Internet and Intranets
MODEM
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
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ROUTER
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.
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SWITCH
A switch is used to connect
different network segments.
A network segment is a set
of computers all connected
together.
Like an intelligent hub.
Internet and Intranets
A Network HUB
A device that connects
computers together
and can link them all
on to another device.
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HARDWARE
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.
Internet and Intranets
Telephone or Data Communications Lines
To connect to the internet you need a link to it.
This link can be
BROADBAND
ADSL or DSL
DIAL UP
ISDN
Internet and Intranets
Types of Line
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)
Internet and Intranets
Other ways to connect to the internet (HARDWARE)
What is there ?
• Smart phone using 3G or 4g
• USB ADSL dongle that connects to a service provider network
Internet and Intranets
ISP – Internet Service Providers
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 services
Bandwidth options.
Email service.
Web Hosting.
Online and Telephone assistance.
Internet and Intranets
Software On The Internet
What software can you think of do you use to access services on the internet ?
OUTLOOK
BROWSERS
EMAIL
FTP – File
Transfer
Protocol
SKYPE
Lime Wire –
File Sharing
FIREWALL
SKYPE
GAMING
STOP
Complete questionnaire 1.1
Internet and Intranets
BROWSERS
Browsers – These allow you to utilise HTTP
and HTTPS to view the WorldWideWeb.
What browsers are there ?
Internet Explorer
Mozilla Firefox
Netscape Navigator
Opera
Internet and Intranets
FTP
File Transfer Protocol is used to access websites via a different
door to download files.
Internet and Intranets
EMAIL Software that composes, sends and receives email
Internet and Intranets
SKYPE
• 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.
Internet and Intranets
GAMING
Accessing games
Internet and Intranets
FILESHARING
• It is possible to share files over the internet
• DropBox is a popular service where files can be uploaded
to let others download them
Internet and Intranets
BROWSER FACILITIES OR FUNCTIONS
What facilities do browsers have available to use ?
Internet and Intranets
Types of Line
Browsers
Internet and Intranets
BROWSER FACILITIES
Navigation, forward and back.
Windows Search
Home
Access to Search Engines and
Webpages
Tabbed browsing
Stop
Refresh
WWW Address bar
Print
Favourites
HyperLinks – HyperText
Browser History
Internet and Intranets
RECAP
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
Complete questionnaire 1.2
Internet and Intranets
Internet Security Risks ?
What risks are there in using the internet
Downloading
Entering Personal Details
Online Banking
Buying Items Off The Internet
Sending Emails
Uploading Files
Internet and Intranets
RISKS !!!
Viruses, attack, hacking,
identity theft, fraud, getting
passwords, stealing bank
details, intercepting emails,
theft of data, posting
unwanted videos, posting
unwanted text………..
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RISK PREVENTION
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
Internet and Intranets
RECAP
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
Complete questionnaire 1.4
Internet and Intranets
LAWS AND GUIDELINES ON THE USE OF IT
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
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3 Major Headings For ICT and The Law
Data Protection Act (1998)
Computer Misuse Act (1990)
Copyright, Design and Patents Act (1988)
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Some Things To Be Aware Of
Copyright
CCTV
Protecion of Use of Information
Fraudulent Use of Data
Sharing Information
Access to your data
Obscene Publications
Hacking and Accessing
Information
Internet Privacy
Data Privacy
CD’s DVD’s Films Filesharing
Fraud
Posting Unwanted files and
photos
Planting viruses and Malware
Deleting Files
Blackmail
STOP
Complete questionnaire 1.5
Laws and Guidelines
Internet and Intranets
Health and Safety
When Using ICT
There are rules and guidelines that govern
your health and safety when using ICT.
Internet and Intranets
STOP
Complete questionnaire 1.5
Health and Safety
Internet and Intranets
Information and Opportunities Available Using the Internet.
Email FTP HTTP HTML
Job Searches research MP3 Video Telephone
Downloads Software Games Images
STOP
Complete questionnaire 1.3