Networking Simulation Labs in Web-enhanced IT Classes

1. 9th NCTT Annual Curriculum Workshop Springfield, Massachusetts, July 10-13, 2006 Networking Simulation Labs in Web-enhanced IT Classes Vladimir Riabov Associate Professor Department of Mathematics & Computer Science Rivier College, USA E-mail: vriabov@rivier.edu

2. Agenda: • Web-enhanced IT Classes at Rivier College; • Lecture Notes and Web Resources; • Virtual OPNET Labs; • Simulation Techniques in Students’ Research Papers: • Project Papers (SANs, WiFi, Gigabit Ethernet, etc.) • Digital Video Cluster Simulation with OMNeT++ • Ethernet and Switched LANs Simulation with OPNET • Simulating Retransmissions for a WiFi-PCF-enabled Stations • Workshop Lab: Small Intranet Simulation with OPNET • Conclusion Networking Simulation Labs

3. Web-enhanced IT Classes at Rivier College • Undergraduate and Graduate Programs in CS & IT http://www.rivier.edu/departments/mathcs/home/cs/CSIndex.htm • Certificates in Networking and Information Technologies • IT-related Courses: • CS553: Introduction to Networking Technology • CS572: Computer Security • CS573: Advanced Wide Area Networks • CS575: Advanced Local Area Networks • CS597: Multimedia and Web Development • CS612: Information Technology • CS632: Client/Server Computing • CS685: Network Management, and others • Web-enhanced Classes and Virtual Labs across CS/IT Curricula Networking Simulation Labs

4. Lecture Notes and Web Resources • Instructor’s Web site (Teaching, Research & Publications): http://www.rivier.edu/faculty/vriabov/ • Web sites for IT Courses • Syllabi • Lecture Notes • Virtual OPNET™ Labs • Assignments • Schedules • Resources • Examples of Students’ Project Papers • Web Resources Networking Simulation Labs

5. Class Assignments • Warm-up Exercises • Homework Assignments • Virtual Labs • Midterm Exams • Project Papers • Research Reports • Final Exams Networking Simulation Labs

6. Warm-up Exercises (examples) • What is the last digit of the number25975927[mod(10)]? • Using MSExcel™ spreadsheet, find the last digit of the number719 [mod(10)]? • How to use your findings in these two cases forencryptinge-messages? Networking Simulation Labs

7. What is the last digit of the number25975927[mod(10)]? • It’s enough to consider the last digit of a simpler number 75927; • Do your experiments (see Table)! • “LAST” can be 7, 9, 3, or 1 only; therefore, it is a cycle of four cases; • The power, 5927 can be represented as 5927 = 4*1481+3; • Therefore, “LAST” of 75927 is the same as the “LAST” of 73, which is “3”. • Answer: “3”. • Try MS Excel™Spreadsheets(see Table)! • Why the last digit of the number 7N at N > 18 is 0 there? • HINT: Consider the number of “valuable” digits in large natural numbers calculated with MS Excel™! Networking Simulation Labs

8. Homework Assignments (example 1) • Using Manchester Encoding Format, encode a bit-stream that represents two first letters of your last name previously written in the ASCII (7-bit) Coding Standard. Using MS Word, plot a diagram that illustrates your Manchester code. Networking Simulation Labs

9. Homework Assignments (example 2) • Plot a diagram that illustrates a virtual private connection from your home computer to the Rivier College Network.Briefly describeissues that should be resolved for establishing this connection. Networking Simulation Labs

10. Homework Assignments (example 3) A LAN has a data rate of r=4 Mbps and a propagation delay between two stations at opposite ends of d=20 μs. For what range of PDU sizes (S, measured in bits) does the stop-and-wait flow control give an efficiency of at least 50%, E > 0.5? (neglect the transmission time for the ACK signal). The efficiency, E is defined as a ratio of the PDU transmission time (time for inserting the PDU onto the medium) to the total time the medium is occupied for this one PDU. Stop-and-wait flow control Crystal Yu’s solution:S=? T=S/r is PDU-transmission time; E=T/(T+d+d);E > 0.5; T>0.5*(T+2*d); T>2d; S>2*d*r; S>2*20*10-6*4*106; Answer:S>160 bits Networking Simulation Labs

11. Visiting the IT Services Department Networking Simulation Labs

12. Visiting the IT Services Department Networking Simulation Labs

13. OPNET Virtual Labs • OPNET IT Guru Academic Edition™ : –http://www.opnet.com/services/university/home.html • OPNET Virtual Lab Manuals: • http://www.opnet.com/services/university/lab_manuals.html • William Stallings, Business Data Communications, Fifth Edition; • William Stallings, Data and Computer Communications, Seventh Edition; • Raymond R. Panko, Business Data Networks and Telecommunications, Fourth Edition; • Larry L. Peterson and Bruce S. Davie, Computer Networks – A Systems Approach,Third Edition; • OPNET IT Guru Academic Edition – A Tool for Networking Education, Regis University; • Security Labs in IT Guru Academic Edition, Universitat Ramon Llull, Spain. Networking Simulation Labs

14. Virtual Labs Four-Six OPNET™ Virtual Labs per Course: (Larry L. Peterson and Bruce S. Davie, Computer Networks – A Systems Approach, Third Edition) • L00: Introduction - Basics of OPNET IT Guru Academic Edition™ • L01: Ethernet - A Direct Link Network with Media Access Control • L02: Token Ring - A Shared-Media Network with Media Access Control • L03: Switched LANs - A Set of Local Area Networks Interconnected by Switches • L04: Network Design - Planning a Network with Different Users, Hosts, and Services • L05: ATM - A Connection-Oriented, Cell-Switching Technology • L06: RIP: Routing Information Protocol - A Routing Protocol Based on the Distance-Vector Algorithm • L07: OSPF: Open Shortest Path First - A Routing Protocol Based on the Link-State Algorithm • L08: TCP: Transmission Control Protocol - A Reliable, Connection-Oriented, Byte-Stream Service • L09: Queuing Disciplines - Order of Packet Transmission and Dropping • L10: RSVP: Resource Reservation Protocol - Providing QoS by Reserving Resources in the Network • L11: Firewalls and VPN - Network Security and Virtual Private Networks • L12: Applications - Network Application Performance Analysis Networking Simulation Labs

15. Virtual Lab Basics Networking Simulation Labs

16. Lab Project Editor Window Networking Simulation Labs

17. Lab: Network Expansion Plan (We will build these networks during the NCTT Workshop today) In this lesson, you plan for the expansion of a small company’s intranet. Currently, the company has astar topology network on the first floorof its office building and plans toadd an additional star topology network on another floor. You will build and test this “what-if” scenario to ensure that the load added by the second network will not cause the network to fail. Networking Simulation Labs

18. Creating a New Scenario Use the Startup Wizard to set up a new scenario: 1 If IT Guru is not already running, start it. 2 Select File > New.... 3 Select Project from the pull-down menu and click OK. 4 Name the project and scenario, as follows: 4.1 Name the project <initials>_Sm_Int Include your initials in the project name to distinguish it from other versions of this project. 4.2 Name the scenario first_floor. 4.3 Click OK.  The Startup Wizard opens. 5 Enter the values shown in the following table in the dialog boxes of the Startup Wizard: Networking Simulation Labs

19. Creating the Network Networking Simulation Labs

20. Creating the Network (Step 2) Building a Server, Application & Profile Networking Simulation Labs

21. Expanding the Network & Comparing Results (Step 3) Comparing Results Networking Simulation Labs

22. Students’ Project Papers: “Storage Area Networks (SANs)” Fibre Channel Technology for Storage Area Networks by David Norman (fibre.pdf file is available) V. Riabov, "Storage Area Networks," The Internet Encyclopedia, Wiley & Sons, Dec. 2003, pp. 1-11. Networking Simulation Labs

23. Students’ Project Papers on Selected Networking Protocols Gigabit Ethrnet, QoS, and Multimedia Applications by Jeff Corbit (gigabit-ethernet.pdf file is available) V. Riabov, “Simple Mail Transfer Protocol," The Handbook of Information Security, Wiley & Sons, Dec. 2005, pp. 1-22. Networking Simulation Labs

24. Students’ Project Papers: “WiFi Technologies” Secure Wi-Fi Technologies for Enterprise LAN Network by Tom Borick (wifi.pdf file is available) V. Riabov, “Going Wireless," Rivier Today Magazine, March 2005. Networking Simulation Labs

25. Digital Video Cluster Simulation with OMNeT++ Digital Video Cluster Simulation by Martin Milkovits (cluster.pdf file is available) Varga, Andras. 2004, OMNeT++ Version 3.0 User Manual [online]. Available via <http://www.omnetpp.org/>. Networking Simulation Labs

26. Digital Video Cluster Simulation (continue) From: Digital Video Cluster Simulation by Martin Milkovits Networking Simulation Labs

27. Digital Video Cluster Simulation (results) From: Digital Video Cluster Simulation by Martin Milkovits Networking Simulation Labs

28. Lab Report: Ethernet Study with OPNET™ (available from: http://www.rivier.edu/journal/ROAJ-2005-Fall/J16-KUMAR.pdf) Networking Simulation Labs

29. Project: Wi-Fi Technology Simulation with OPNET™ (CS575 Project Paper by Vandana Wekhande, Spring 2006) Networking Simulation Labs

30. Conclusions • Web-enhanced classes and virtual labs in Networking Technologies and other related areas provide students with better instructional support than “traditional” classes; • Warm-up in-class exercises, homework assignments, lecture notes, field trips to IT Service Department, and virtual labs help students being familiar with modern state-of-the-arts networking technologies; • Students’ challenge projects and research become vital components of their active studies at colleges that help students finding jobs and being promoted in the networking companies; • Instructional openness and support become powerful resource for students in classroom and in their future professional life. Networking Simulation Labs