tailieunhanh - Lecture Business data communications and networking (8th edition): Chapter 10 - Jerry Fitzgerald, Alan Dennis

Chapter 10 - The internet. In this chapter, the following content will be discussed: How internet works: architecture; internet access technologies: DSL and cable modem, wireless access; internet governance: internet 2. | Business Data Communications and Networking 8th Edition Jerry Fitzgerald and Alan Dennis John Wiley & Sons, Inc Prof. M. Ulema Manhattan College Computer Information Systems 10 - Copyright 2005 John Wiley & Sons, Inc Chapter 10 The Internet 10 - Copyright 2005 John Wiley & Sons, Inc Outline How Internet works Architecture Internet Access Technologies DSL and cable modem Wireless Access Internet Governance Internet 2 10 - Copyright 2005 John Wiley & Sons, Inc Internet Most used network in the world Not one network, but a network of networks Made up of thousands of networks of National and state government agencies, Non-profit organizations and for-profit companies. A rigidly controlled club To exchange data, these networks must agree to use Internet protocols TCP/IP MUST be supported by all networks Unrestricted applications and contents Developed freely 10 - Copyright 2005 John Wiley & Sons, Inc Internet’s Hierarchical Structure National Internet Service Providers | Business Data Communications and Networking 8th Edition Jerry Fitzgerald and Alan Dennis John Wiley & Sons, Inc Prof. M. Ulema Manhattan College Computer Information Systems 10 - Copyright 2005 John Wiley & Sons, Inc Chapter 10 The Internet 10 - Copyright 2005 John Wiley & Sons, Inc Outline How Internet works Architecture Internet Access Technologies DSL and cable modem Wireless Access Internet Governance Internet 2 10 - Copyright 2005 John Wiley & Sons, Inc Internet Most used network in the world Not one network, but a network of networks Made up of thousands of networks of National and state government agencies, Non-profit organizations and for-profit companies. A rigidly controlled club To exchange data, these networks must agree to use Internet protocols TCP/IP MUST be supported by all networks Unrestricted applications and contents Developed freely 10 - Copyright 2005 John Wiley & Sons, Inc Internet’s Hierarchical Structure National Internet Service Providers (ISPs) Provide services to their customers and sell access to regional ISPs and local ISPs Regional ISPs Connect with National ISPs Provide services to their customers and sell access to local ISPs Local ISPs Connected to National or Regional ISPs Sell access to individuals 10 - Copyright 2005 John Wiley & Sons, Inc Internet’s Access Points Network Access Points (NAPs) Connect National ISPs together Sometimes large regional and local ISPs also have access directly to NAPs Indiana University, for example, which provides services to about 40,000 individuals, connects directly to the Chicago NAP About a dozen NAPs in the . Run by common carriers such as Sprint and AT&T Metropolitan Area Exchanges (MAEs) Connect Regional ISPs together About 50 such MAEs in the . today 10 - Copyright 2005 John Wiley & Sons, Inc Basic Internet Architecture 10 - Copyright 2005 John Wiley & Sons, Inc Packet Exchange Charges Peering ISPs at the same level usually do not charge each other for