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Introduction to Internets and Intranets.ppt
The document provides an overview of internet and intranets, including: - The internet is a worldwide network that connects computers using IP and allows services like the web, email, file sharing and more. Intranets are internal websites for companies only accessible by employees. - Hardware like computers, routers, modems and switches are needed to connect to the internet or intranets via methods such as broadband, dial-up, or mobile data. Software like browsers, email clients, and apps allow access to online services. - Risks of using the internet include viruses, hacking, identity theft and more. Users should take precautions like using firewalls, antivirus software, and being wary of scams. Laws
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Introduction to Internets and Intranets.ppt
- 1. INTERNET AND INTRANETS Introduction to JOHNBABATUNDE LEE
- 2. In this sessionour 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.
- 3. The Internet Internet andIntranets 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.
- 4. Uses for theinternet 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
- 5. INTRANETS Internet and Intranets Whatis 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
- 6. Connection to theinternet - 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
- 7. MODEM Internet and Intranets MODulator-DEModulator Convertsdigital 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.
- 8. Internet and Intranets MODEM FMFrequency Modulation AM Amplitude Modulation Modulate a carrier signal into 1’s and 0’s. FM How Often AM Loudness/Amplification
- 9. ROUTER Internet and Intranets Arouter 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.
- 10. SWITCH Internet and Intranets Aswitch is used to connect different network segments. A network segment is a set of computers all connected together. Like an intelligent hub.
- 11. A Network HUB Internetand Intranets A device that connects computers together and can link them all on to another device.
- 12. HARDWARE Internet and Intranets Orderof 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.
- 13. Telephone or DataCommunications 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
- 14. Types of Line Internetand 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)
- 15. Other ways toconnect 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
- 16. ISP – InternetService 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 services Bandwidth options. Email service. Web Hosting. Online and Telephone assistance.
- 17. Software On TheInternet Internet and Intranets What software can you think of do you use to access services on the internet ? BROWSERS EMAIL Lime Wire – File Sharing SKYPE GAMING FTP – File Transfer Protocol IMS OUTLOOK FIREWALL
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- 19. 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
- 20. FTP Internet and Intranets FileTransfer Protocol is used to access websites via a different door to download files.
- 21. EMAIL Internet and Intranets Softwarethat composes, sends and receives email
- 22. 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.
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- 24. 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
- 25. BROWSER FACILITIES ORFUNCTIONS Internet and Intranets What facilities do browsers have available to use ?
- 26. Types of Line Internetand Intranets Browsers
- 27. BROWSER FACILITIES Internet andIntranets Navigation, forward and back. Home Tabbed browsing Stop Refresh WWW Address bar Print Favourites Windows Search Access to Search Engines and Webpages HyperLinks – HyperText Browser History
- 28. RECAP Internet and Intranets Inthis 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
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- 30. 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
- 31. RISKS !!! Internet andIntranets Viruses, attack, hacking, identity theft, fraud, getting passwords, stealing bank details, intercepting emails, theft of data, posting unwanted videos, posting unwanted text………..
- 32. RISK PREVENTION Internet andIntranets 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
- 33. RECAP Internet and Intranets Inthis 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.
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- 35. LAWS AND GUIDELINESON 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
- 36. 3 Major HeadingsFor ICT and The Law Internet and Intranets Data Protection Act (1998) Computer Misuse Act (1990) Copyright, Design and Patents Act (1988)
- 37. Some Things ToBe 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
- 38. STOP Complete questionnaire 1.5 Lawsand Guidelines
- 39. Health and Safety WhenUsing ICT Internet and Intranets There are rules and guidelines that govern your health and safety when using ICT.
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- 41. STOP Complete questionnaire 1.5 Healthand Safety
- 42. Information and OpportunitiesAvailable Using the Internet. Internet and Intranets Email FTP HTTP HTML Job Searches research MP3 Video Telephone Downloads Software Games Images
- 43. STOP! HOW CAN YOUUSED INTERNET AND INTRANETS TO ADVANCE YOUR BUSINESS?
- 44. THANK YOU FORYOUR KIND ATTENTION !