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ECEN 619-600 “Internet Protocols and Modeling”

This course material covers the TCP/IP protocol layers, including the physical layer, network access layer, internet layer, host-to-host layer, and application layer. It also explores the functions of routers and the differences they must accommodate in various networks.

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ECEN 619-600 “Internet Protocols and Modeling”

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  1. ECEN 619-600 “Internet Protocols and Modeling” Course Materials: Papers, Reference Texts: Bertsekas/Gallager, Stuber, Stallings, etc Lecture notes and Paper Reading Lists: available on-line: TBA Class Website: http://ece.tamu.edu/~xizhang/ECEN619/start.php Research Interests and Projects: URL:http://ece.tamu.edu/~xizhang Instructor: Professor Xi Zhang E-mail: xizhang@ece.tamu.edu Office: WERC 331 ECEN 619, Internet Protocols & Modeling

  2. TCP/IP Layers: 5-Layer Protocol Model • 1) Physical layer • 2) Network access layer • 3) Internet layer • 4) Host-to-host, or transport layer • 5) Application layer ECEN 619, Internet Protocols & Modeling

  3. TCP/IP Physical Layer • Covers the physical interface between a data transmission device and atransmission medium or network • Physical layer specifies: • Characteristics of the transmission medium • The nature of the signals • The data rate • Other related matters ECEN 619, Internet Protocols & Modeling

  4. TCP/IP Network Access Layer • Concerned with the exchange of data between an end system and the network to which it's attached • Software used depends on type of network • Circuit switching • Packet switching (e.g., X.25) • LANs (e.g., Ethernet) • Others ECEN 619, Internet Protocols & Modeling

  5. TCP/IP Internet Layer • Uses internet protocol (IP) • Provides routing functions to allow data to traverse multiple interconnected networks • Implemented in end systems and routers ECEN 619, Internet Protocols & Modeling

  6. TCP/IP Host-to-Host, or Transport Layer • Commonly uses transmission control protocol (TCP) • Provides reliability during data exchange • Completeness • Order ECEN 619, Internet Protocols & Modeling

  7. TCP/IP Application Layer • Logic supports user applications • Uses separate modules that are peculiar to each different type of application ECEN 619, Internet Protocols & Modeling

  8. Protocol Data Units (PDUs) ECEN 619, Internet Protocols & Modeling

  9. TCP Header Format ECEN 619, Internet Protocols & Modeling

  10. IP Header Format-1: IPv4 Header ECEN 619, Internet Protocols & Modeling

  11. IP Header Format-2: IPv6 Header (Newer Version since 1995) ECEN 619, Internet Protocols & Modeling

  12. Common TCP/IP Applications • Simple mail transfer protocol (SMTP) • Provides a basic electronic mail facility • File Transfer Protocol (FTP) • Allows files to be sent from one system to another • TELNET • Provides a remote logon capability ECEN 619, Internet Protocols & Modeling

  13. Service Access Point (SAP) under TCP/IP Concepts ECEN 619, Internet Protocols & Modeling

  14. Internetworking Terms • Communication network – facility that provides a data transfer service among devices attached to the network • Internet – collection of communication networks, interconnected by bridges/routers • Intranet – internet used by an organization for internal purposes • Provides key Internet applications • Can exist as an isolated, self-contained internet ECEN 619, Internet Protocols & Modeling

  15. Internetworking Terms • End System (ES) – device used to support end-user applications or services • Intermediate System (IS) – device used to connect two networks • Bridge – an IS used to connect two LANs that use similar LAN protocols • Router - an IS used to connect two networks that may or may not be similar (such as WAN and LAN) ECEN 619, Internet Protocols & Modeling

  16. Functions of a Router • Provide a link between networks • Provide for the routing and delivery of data between processes on end systems attached to different networks • Provide these functions in such a way as not to require modifications of the networking architecture of any of the attached sub-networks ECEN 619, Internet Protocols & Modeling

  17. An Example of Router Applications ECEN 619, Internet Protocols & Modeling

  18. Network Differences Routers Must Accommodate • Addressing schemes • Different schemes for assigning addresses • Maximum packet sizes • Different maximum packet sizes requires segmentation • Interfaces • Differing hardware and software interfaces • Reliability • Network may provide unreliable service ECEN 619, Internet Protocols & Modeling

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