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
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
July 2006
Networking Simulation Labs
2
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
July 2006
Networking Simulation Labs
3
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
July 2006
Networking Simulation Labs
4
Class Assignments
•
•
•
•
•
•
•
Warm-up Exercises
Homework Assignments
Virtual Labs
Midterm Exams
Project Papers
Research Reports
Final Exams
July 2006
Networking Simulation Labs
5
Warm-up Exercises (examples)
• What is the last digit of the number 25975927
[mod(10)]?
• Using MSExcel™ spreadsheet, find the last
digit of the number 719 [mod(10)]?
• How to use your findings in these two cases
for encrypting e-messages?
July 2006
Networking Simulation Labs
6
What is the last digit of the number
25975927 [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™!
July 2006
Networking Simulation Labs
7^N
N
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
7
49
343
2401
16807
117649
823543
5764801
40353607
282475249
1977326743
13841287201
96889010407
678223072849
4747561509943
33232930569601
232630513987207
1628413597910450
11398895185373100
79792266297612000
7
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.
July 2006
Networking Simulation Labs
8
Homework Assignments (example 2)
• Plot a diagram that
illustrates a virtual
private connection
from your home
computer to the Rivier
College Network.
Briefly describe issues
that should be
resolved for
establishing this
connection.
July 2006
Networking Simulation Labs
9
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
July 2006
Networking Simulation Labs
10
Visiting the IT Services Department
July 2006
Networking Simulation Labs
11
Visiting the IT Services Department
July 2006
Networking Simulation Labs
12
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.
July 2006
Networking Simulation Labs
13
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, ByteStream 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
July 2006
Networking Simulation Labs
14
Virtual Lab Basics
July 2006
Networking Simulation Labs
15
Lab Project Editor Window
July 2006
Networking Simulation Labs
16
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 a star
topology network on the
first floor of its office
building and plans to
add an additional star
topology network on
another floor. You will
build and test this “whatif” scenario to ensure
that the load added by
the second network will
not cause the network
to fail.
July 2006
Networking Simulation Labs
17
Creating a New Scenario
Use the Startup Wizard to set up a new
scenario:
1 If IT Guru is not already running, start it.
5 Enter the values shown in the following
table in the dialog boxes of the Startup
Wizard:
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.
July 2006
Networking Simulation Labs
18
Creating the Network
July 2006
Networking Simulation Labs
19
Creating the Network (Step 2)
Building a Server, Application & Profile
July 2006
Networking Simulation Labs
20
Expanding the Network & Comparing Results (Step 3)
Comparing Results
July 2006
Networking Simulation Labs
21
Students’ Project Papers: “Storage Area Networks (SANs)”
Fibre Channel Technology for Storage Area Networks
by David Norman (fibre.pdf file is available)
July 2006
V. Riabov, "Storage Area Networks," The Internet
Encyclopedia, Wiley & Sons, Dec. 2003, pp. 1-11.
Networking Simulation Labs
22
Students’ Project Papers on Selected Networking Protocols
Gigabit Ethrnet, QoS, and Multimedia Applications
by Jeff Corbit (gigabit-ethernet.pdf file is available)
July 2006
V. Riabov, “Simple Mail Transfer Protocol," The
Handbook of Information Security, Wiley & Sons,
Dec. 2005, pp. 1-22.
Networking Simulation Labs
23
Students’ Project Papers: “WiFi Technologies”
Secure Wi-Fi Technologies for Enterprise LAN Network
by Tom Borick (wifi.pdf file is available)
July 2006
V. Riabov, “Going Wireless," Rivier Today Magazine,
March 2005.
Networking Simulation Labs
24
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/>.
July 2006
Networking Simulation Labs
25
Digital Video Cluster Simulation (continue)
From: Digital Video Cluster Simulation by Martin Milkovits
July 2006
Networking Simulation Labs
26
Digital Video Cluster Simulation (results)
From: Digital Video Cluster Simulation by Martin Milkovits
July 2006
Networking Simulation Labs
27
Lab Report: Ethernet Study with OPNET™
(available from: http://www.rivier.edu/journal/ROAJ-2005-Fall/J16-KUMAR.pdf)
July 2006
Networking Simulation Labs
28
Project: Wi-Fi Technology Simulation with OPNET™
(CS575 Project Paper by Vandana Wekhande, Spring 2006)
July 2006
Networking Simulation Labs
29
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.
July 2006
Networking Simulation Labs
30