1 The Internet Introductory material. An overview lecture that covers Internet related topics, including a definition of the Internet, an overview of its.

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Presentation transcript:

1 The Internet Introductory material. An overview lecture that covers Internet related topics, including a definition of the Internet, an overview of its history and growth, and standardization and naming.

2 What defines the Internet ? 1.Use of a globally unique address space based on Internet Protocol (IP) Addresses 2.Support of the Transmission Control Protocol/Internet Protocol (TCP/IP) suite for communications 3.Offers end-to-end delivery service for applications

3 A Definition On October 24, 1995, the FNC passed a resolution defining the term Internet. RESOLUTION: The Federal Networking Council (FNC) agrees that the following language reflects our definition of the term "Internet". "Internet" refers to the global information system that -- (i) is logically linked together by a globally unique address space based on the Internet Protocol (IP) or its subsequent extensions/followons; (ii) is able to support communications using the Transmission Control Protocol/Internet Protocol (TCP/IP) suite or its subsequent extensions/follow-ons, and/or other IP-compatible protocols; and (iii) provides, uses or makes accessible, either publicly or privately, high level services layered on the communications and related infrastructure described herein.

4 History of the Internet Mid 1960: Papers on “Packet Switching” emerge. End 1969s: ARPA sponsors the development of a packet-switching network, called the ARPANET. First four nodes are UCLA, SRI, U. Utah, UCSB. 1974: The TCP/IP protocols and model are being proposed by Cerf/Kahn. 1983: ARPANET adopts TCP/IP. At this time, the ARPANET has 200 routers. 1984: NSF funds a TCP/IP based backbone network. This backbone grows into the NSFNET, which becomes the successor of the ARPANET. 1995: NSF stops funding of NSFNET. The Internet is completely commercial.

Growth of the Internet 5

6 Who is Who on the Internet ? Internet Society (ISOC): Founded in 1992, an international nonprofit professional organization that provides administrative support for the Internet. Founded in 1992, ISOC is the organizational home for the standardization bodies of the Internet. Internet Engineering Task Force (IETF): Forum that coordinates the development of new protocols and standards. Organized into working groups that are each devoted to a specific topic or protocol. Working groups document their work in reports, called Request For Comments (RFCs). IRTF (Internet Research Task Force): The Internet Research Task Force is a composed of a number of focused, long-term and small Research Groups. Internet Architecture Board (IAB): a technical advisory group of the Internet Society, provides oversight of the architecture for the protocols and the standardization process The Internet Engineering Steering Group (IESG): The IESG is responsible for technical management of IETF activities and the Internet standards process. Standards. Composed of the Area Directors of the IETF working groups.

7 Internet Standardization Process Working groups present their work i of the Internet are published as RFC (Request for Comments). RFCs are the basis for Internet standards. Not all RFCs become Internet Standards ! (There are 6000 RFCs and only about 70 Internet standards A typical (but not only) way of standardization is: –Internet Drafts –RFC –Proposed Standard –Draft Standard (requires 2 working implementation) –Internet Standard (declared by IAB)

8 Assigning Identifiers for the Internet Who assigns the domain name “tcpip-lab.edu” and who assigns it the network prefix “ /16”? Who assigns port 80 as the default port for web servers? The functions associated with the assignment of numbers is referred to as Internet Assigned Number Authority (IANA). Early days of the Internet: IANA functions are administered by a single person (Jon Postel). Today: Internet Corporation for Assigned Names and Numbers (ICANN) assumes the responsibility for the assignment of technical protocol parameters, allocation of the IP address space, management of the domain name system, and others. Management of IP address done by Regional Internet Registries (RIRs): –APNIC (Asia Pacific Network Information Centre) –RIPE NCC (Réseaux IP Européens Network Coordination Centre) –ARIN (American Registry for Internet Numbers) Domain names are administered by a large number of private organizations that are accredited by ICANN.