1. COMP 6005 An Introduction To Computing Session Four: Internetworking and the World Wide Web

2. COMP 6005 An Introduction To Computing - Session Three: Internetworking and the World Wide Web2 Objectives Describe and distinguish between the Internet and the World Wide Web Distinguish between the Internet and an intranet Describe how computers communicate with each other via computer networks Compare and contrast network architectures Describe the services available on the web –E.g: FTP and Web search

3. COMP 6005 An Introduction To Computing - Session Three: Internetworking and the World Wide Web3 Objectives Compare and contrast Internet connectivity options Discuss border and jurisdiction issues, contracts, online crime, taxation Distinguish between different web applications and tools Describe the software requirements for an e- commerce/e-business initiative

4. COMP 6005 An Introduction To Computing - Session Three: Internetworking and the World Wide Web4 Definitions Intranets Extranets Virtual Private Networks The Internet The World Wide Web Internets

5. COMP 6005 An Introduction To Computing - Session Three: Internetworking and the World Wide Web5 Intranets private computer network that uses Internet protocols, network connectivity, and possibly the public telecommunication system to securely share part of an organization's information or operations with its employees Sometimes the term refers only to the most visible service, the internal website private network that is contained within an enterprise. It may consist of many interlinked local area networks and also use leased lines in the wide area network main purpose of an intranet is to share company information and computing resources among employees. An intranet can also be used to facilitate working in groups and for teleconferences

6. COMP 6005 An Introduction To Computing - Session Three: Internetworking and the World Wide Web6 Extranets When part of an intranet is made accessible to customers, partners, suppliers, or others outside the company, that part becomes part of an extranet. part of a company's Intranet that is extended to users outside the company can access an extranet only if you have a valid username and password, and your identity determines which parts of the extranet you can view extranet requires security and privacy. These can include firewalls, server management, the issuance and use of digital certificates or similar means of user authentication, encryption of messages, and the use of virtual private networks (VPNs) that tunnel through the public network becoming a very popular means for business partners to exchange information.

7. COMP 6005 An Introduction To Computing - Session Three: Internetworking and the World Wide Web7 Virtual Private Network private communications network often used within a company, or by several companies or organizations, to communicate confidentially over a publicly accessible network VPN message traffic can be carried over a public networking infrastructure (e.g. the Internet) on top of standard protocols, or over a service provider's private network can be contrasted with an expensive system of owned or leased lines that can only be used by one organization. The goal of a VPN is to provide the organization with the same capabilities, but at a much lower cost

8. COMP 6005 An Introduction To Computing - Session Three: Internetworking and the World Wide Web8 The Internet worldwide, publicly accessible network of interconnected computer networks that transmit data by packet switching using the standard Internet Protocol a "network of networks" that consists of millions of smaller domestic, academic, business, and government networks, which together carry various information and services, such as electronic mail, online chat, file transfer, and the interlinked Web pages and other documents of the World Wide Web

9. COMP 6005 An Introduction To Computing - Session Three: Internetworking and the World Wide Web9 The World Wide Web Contrary to some common usage, the Internet and the World Wide Web are not synonymous Internet is a collection of interconnected computer networks, linked by copper wires, fiber- optic cables, wireless connections, etc the Web is a collection of interconnected documents and other resources, linked by hyperlinks and URLs. The World Wide Web is accessible via the Internet, as are many other services including e- mail, file sharing, and others described below

10. COMP 6005 An Introduction To Computing - Session Three: Internetworking and the World Wide Web10 Internets being a contraction of internetwork or internetworking and Internet referring to the worldwide network. Under this distinction, the Internet is a particular internet, but the reverse does not apply

11. COMP 6005 An Introduction To Computing - Session Three: Internetworking and the World Wide Web11 Links Reference –Whatis.com, http://www.whatis.comhttp://www.whatis.com –Webopedia.com, http://www.webopedia.comhttp://www.webopedia.com –Wikipedia.com, http://www.wikipedia.comhttp://www.wikipedia.com