1. Slide 5.1 Curtis/Cobham © Pearson Education Limited 2008 Chapter 5 The Internet and the World Wide Web

2. Slide 5.2 Curtis/Cobham © Pearson Education Limited 2008 The Internet The evolution of the Internet Connection to the Internet –LAN gateway –internet service provider Addresses and domain names –domain name server –IP address

3. Slide 5.3 Curtis/Cobham © Pearson Education Limited 2008 Connections and the Internet Figure 5.1 Connections and the Internet

4. Slide 5.4 Curtis/Cobham © Pearson Education Limited 2008 Connection Through the Internet Packet switching TCP/IP –internet protocol –transmission control protocol Point-to-point protocol

5. Slide 5.5 Curtis/Cobham © Pearson Education Limited 2008 Internet connection (a) (b) Figure 5.3 (a) A virtual network connection (produced by NeoTrace); (b) Nodes used to establish the network connection Source: McAffee www.mcaffee.com

6. Slide 5.6 Curtis/Cobham © Pearson Education Limited 2008 Internet connection (Continued) (c) Figure 5.3 (c) NeoTrace Version 3.25 – trial trace results Source: McAffee www.mcaffee.com

7. Slide 5.7 Curtis/Cobham © Pearson Education Limited 2008 What The Internet offers E-mail WWW TELNET FTP Instant messaging Telephony/conferencing Collaborative working tools

8. Slide 5.8 Curtis/Cobham © Pearson Education Limited 2008 The World Wide Web Figure 5.8 Markup languages HTML SGML, XML

9. Slide 5.9 Curtis/Cobham © Pearson Education Limited 2008 The World Wide Web (Continued) Web browsers –HTTP –Uniform Resource Locators Web search engines Plug-ins Java Organizational control of the Internet

10. Slide 5.10 Curtis/Cobham © Pearson Education Limited 2008 The Internet and Financial Transactions Electronic credit card transactions Electronic cash Electronic cash substitutes Security and electronic payments

11. Slide 5.11 Curtis/Cobham © Pearson Education Limited 2008 Intranets and extranets Intranet construction –firewall Intranet usage Extranet construction –virtual private network