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Introduction to Technology Infrastructure

Introduction to Technology Infrastructure. Chapter 1. Announcements and Outline. Syllabus Questions Class Survey Results Class Outline 1.Introduction to Networks 1.1 Network Types/Technologies 1.2 Layering and Packetization. 2. 1.1 Network Types/Technologies.

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Introduction to Technology Infrastructure

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  1. Introduction to Technology Infrastructure Chapter 1

  2. Announcements and Outline • Syllabus Questions • Class Survey Results • Class Outline 1.Introduction to Networks 1.1 Network Types/Technologies 1.2 Layering and Packetization 2

  3. 1.1 Network Types/Technologies • How we view a network geographically • Representing Networks in diagrams 3

  4. 1.1 Network Types/Technologies 4

  5. 1.1 Network Types/Technologies Local Area Networks (LAN) Wireless Local Area Networks (WLAN) Backbone MAN WAN 5

  6. 1.2 Network Layers • Most Commonly Used Models: • OSI (Open Systems Interconnection Reference Model) • Network Model • Protocols & Protocol Data Unit (PDU) 6

  7. 1.2 Network Layers (Network Model) 7

  8. 1.2 Network Layers (CCNA TCP/IP Model) 8

  9. 1.2 Network Layers – Packetization *From Agarwal – Business Data Communications • Packetization is • breaking down user data into small segments • packaging these segments appropriately so that they can be delivered and reassembled across the network 9

  10. 1.2 Network Layers – 5 Important Data Comm. Tasks

  11. 1.2 Network Layers • APPLICATION LAYER • Software used by the users • Common Examples: • Protocols: • PDU: 11

  12. 1.2 Network Layers • TRANSPORT LAYER • End to end management • Responsibilities: (1) Link Applications Layer • Segmenting and Tracking • Session Management 12

  13. 1.2 Network Layers TRANSPORT LAYER (cont.) Protocols: PDU: 13

  14. 1.2 Network Layers • NETWORK LAYER • Decides where the messages should go • Functions: • Addressing • Routing • Protocol: • PDU: 14

  15. 1.2 Network Layers • DATA LINK LAYER • Moves messages from one computer to the next • Functions: • Controls Hardware • Formats Messages • Error Checking • Protocol: • PDU: 15

  16. 1.2 Network Layers • PHYSICAL LAYER • Hardware that transmits the message • Protocols: • PDU: 16

  17. 1.2 Network Layers - Summary 17

  18. Network Model technologies by layer 18

  19. 1.2 Network Layers - Summary 19

  20. 1.2 Network Layers – Msg Transmission 20

  21. 1.2 Network Layers Standards • IEEE (Institute of Electrical and Electronics Engineering) – develops US standards • Formal Standardization Process • Internet technology standards are publicly available as Requests For Comment (RFCs) • http://www.ietf.org/rfc.html • Highly recommended standards • Email: http://www.ietf.org/rfc/rfc0821.txt • HTTP: http://www.ietf.org/rfc/rfc2616.txt • TCP: http://www.ietf.org/rfc/rfc0793.txt • IP: http://www.ietf.org/rfc/rfc0791.txt • TCP/ IP tutorial: http://www.ietf.org/rfc/rfc1180.txt • Domain names: http://www.ietf.org/rfc/rfc1034.txt 21

  22. Pros and Cons of using Layers CONS: 22

  23. Pros and Cons of using Layers PROS: 23

  24. Recap • Network Types 1.1 Network Types • LAN • WLAN • Backbone • WAN 1.2 Network Layers • Network Model • Standards • Pros/Cons 24

  25. Next Week • Chapter 2 – Application Layer • Hardware • Software Architecture • Web • Email • Remember no classon Monday (Campus Holiday) 25

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