NETW 503:Internet Course Instructor: Tallal Elshabrawy Instructor Office: C3.321 Lecture Time & Loc.: Sun. 3 rd Slot Instructor

© Tallal Elshabrawy 2 Text Book and References Reference Books: “Communications Networks 2nd Edition”, A. Leon-Garcia, and I. Widjaja, McGraw Hill, 2003 “Computer Networking: A Top-Down Approach Featuring the Internet 3rd Edition”, J. F. Kurose, and K. W. Ross, Addison Wesley, 2005

© Tallal Elshabrawy 3 Course Pre-Requisites None

© Tallal Elshabrawy WiFi Networks DSL Networks Cable Networks Optical Networks Sensor Networks Data Centers and Cloud Computing Body Area Networks Home Networks The Networks Revolution

© Tallal Elshabrawy Telecommunications BusinessInter vehicle communication HealthIndustrial Process Control Agriculture & Irrigation Mobile Applications Networks in Diverse Businesses

© Tallal Elshabrawy 6 Why Internet?

© Tallal Elshabrawy 7 What will you learn from the Course? Internet Protocol Architecture Routing in the Internet Internet Transport Protocols Developments Towards IPv6 Fundamentals of Internet of Things Introduction to Software Defined Networks

© Tallal Elshabrawy 8 Course Assessment Assignments (Best 2 out of 3):10 % Quizzes(Best 2 out of 3) : 15 % Project:15 % Midterm Exam:20 % Final Exam:40 %

1. Layered Architecture of Communication Networks

© Tallal Elshabrawy 10 What is a Communication Network? A system connecting different devices such as Phones, Mobiles, PCs, Printers, and Disk Drives Why do we need Communication Networks? Need to communicate and share information among different devices Direct connectivity between each and every device is not feasible Direct connectivity between each and every device is not actually necessary In the following we shall focus on Computer Networks Comm. Networks: First Set of Questions

© Tallal Elshabrawy 11 The Need for Standards Computers have different architectures, understand different languages, store data in different formats, and communicate at different rates Getting everybody to agree on a particular standard has not been easy Defacto Standards: Standards that exist by the virtue of wide spread use Vendors know that producing products consistent with them will have a large market Standards adopted by Agencies: Write a proposal and submit it to an agency for consideration If the proposal has merit and wide spread acceptance, the agency will make suggestions and send it back to the originators for modifications After several rounds of suggestions and modifications the proposal will be adopted or refused

© Tallal Elshabrawy 12 Describes a seven-layer abstract reference model for a network architecture Purpose of the reference model was to provide a framework for the development of protocols Open System Interconnect (OSI) Developed by ISO (International Organization for Standardization) Open System: A set of protocols that would allow any two different computers to communicate regardless of their underlying architecture OSI Reference Model

© Tallal Elshabrawy The Concept of Layering 13