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EEC484584 Computer Networks

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EEC-484/584: Computer Networks. Wenbing Zhao. Instructor Information ... Learning networking protocols with iPod Touch Sponsored by the CSU Center for ... – PowerPoint PPT presentation

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Title: EEC484584 Computer Networks


1
EEC-484/584Computer Networks
  • Lecture 1
  • Wenbing Zhao
  • Cleveland State University
  • wenbing_at_ieee.org

2
Instructor Information
  • Instructor Dr. Wenbing Zhao
  • Office SH434
  • Email wenbing_at_ieee.org
  • Lecture MW 600-750pm, SH306
  • Office hours MW 200-400pm and by appointment

3
What is Computer Network?
  • A group of computers inter-connected together

Local Area Network
4
What is Computer Network?
  • A group of computer inter-connected together

Wide Area Network
5
What are the Elementsin a Computer Network?
  • Hosts computers
  • Communication medium cables, wireless medium
    (EM waves)
  • Routers forward a packet from one place to
    another, decide on a path from source to
    destination
  • Protocols rules governing the communication

6
Achieving Connectivity is Not Easy
Transport Service User
  • Layered approach
  • We will study issues in each layer in a top-down
    order
  • Application
  • Transport
  • Network
  • Link

Transport Service Provider
Physical Layer is not covered
7
Course Objectives
  • Good understanding of the computer networking
    technologies
  • How connectivity is achieved?
  • Hands on experience
  • Labs observe how protocols work
  • Project write about computer networks elements
    and hopefully write some demo programs

8
Prerequisite
  • Officially graduate standing
  • Ideally You should have sufficient computer
    engineering background
  • You have taken undergraduate-level operating
    systems, data structure and algorithms, and
    programming language courses
  • You know how to write technical reports in
    English (in your own words)

9
Topics
  • Overview of computer networks
  • Types of computer networks
  • Reference models
  • Protocols, services and interfaces
  • Circuit switched vs. packet switched
  • Connection oriented vs. connectionless

10
Topics
  • Application Layer
  • HyperText Transfer Protocol (HTTP)
  • Domain Name Service (DNS)
  • FTP, Email
  • Physical Layer skipped

11
Topics
  • Transport layer
  • Main service End-to-end reliable communication
  • User Datagram Protocol (UDP)
  • Transport Control Protocol (TCP)

12
Topics
  • Network layer
  • Main service routing over multiple hops
  • Routing algorithms
  • Internet Protocol (IP)
  • IP address allocation
  • Internet Control Protocols ICMP, ARP, DHCP

13
Topics
  • Data Link Layer (part 1) Basic communication
    protocols
  • Main service provide point-to-point single hop
    communication service to higher layer
  • Framing group bits together
  • Error control
  • Flow control

14
Topics
  • Data Link Layer (part 2) Medium access control
    protocols
  • Shared medium, multiple concurrent users, need to
    address conflict

15
Labs
  • Purpose Observe how protocols work
  • Tools used Wireshark
  • 5 lab sessions
  • HTTP
  • DNS
  • TCP
  • IP
  • Ethernet, ARP DHCP

Tell me and I forget. Show me and I remember.
Involve me and I understand. - Chinese proverb
Lab instructions taken from Kuroses book
16
Labs
  • Lab sessions are mandatory unless an exception is
    granted in advance
  • I will not accept the lab report if you do now
    show up during the lab session without prior
    notice
  • Lab report must be typed (with both questions and
    answers) and submitted in hardcopy on or before
    due date

17
Special Labs
  • Learning networking protocols with iPod Touch
    Sponsored by the CSU Center for Teaching
    Excellence
  • Up to three labs
  • Reliable data communication
  • Routing
  • Medium access protocols

18
Projects
  • Build a wiki page
  • For individual or a team of two
  • To gain extra-credit, you are encouraged to build
    demonstration programs
  • Java applet or plain Java application,
  • NS2 simulator

19
Project
  • Select a topic related to Computer Networks and
    build a wiki page for the topic on
    http//www.pbwiki.com/ or a similar Web hosting
    site
  • For example topics, see the syllabus
  • Furthermore, peer-review and revision steps are
    required
  • Each team is required to review three wiki pages
    built by other teams anonymously
  • You must revise your page according to the reviews

20
Class Participation
  • 10 of the course credit
  • In general, there is a mock quiz in the beginning
    of each lecture, so that
  • I know who is here I get feedback for my
    teaching
  • To obtain the full credit for class
    participation, you must satisfy ALL of the
    following conditions
  • You do not miss more than 2 lectures
  • You do not miss any quiz and lab sessions
  • You asked at least 10 questions during the
    semester
  • You will lose all 10 credit if you miss more
    than 6 lectures/labs (unless an exception is
    granted)

21
Class Participation
  • Send me an email with the following information
    for each question you have asked within 24 hours
    after each lecture
  • The question you asked
  • My response
  • Your comment on my response and suggestion for
    improvement, if any

22
Class Participation
  • You are also encouraged to send me
    comments/suggestions on how you would like me to
    improve my teaching so that it is more conducive
  • For each piece of comment/suggestion, it will be
    counted as 2 questions
  • If you max out the class participation credit,
    you will get extra credit if you provide further
    feedbacks

23
Quizzes
  • 5 quizzes. Basically one quiz for each layer
  • The quizzes are closed book and closed notes,
    except that you are allowed to bring with you a
    one-page hand-written cheat sheet no larger than
    the US letter size (double-sided allowed)
  • No makeup quizzes!
  • No midterms and final exam
  • Perks only the best of 4 quizzes will be counted
    towards your grade

24
Grading
  • Grading scale
  • A 90-100
  • A- 85-89
  • B 75-84
  • B 65-74
  • B- 60-64
  • C 50-59
  • F
  • Class participation 10
  • Quizzes 50
  • Labs 20
  • Project 20

25
Do not cheat!
  • Do not copy other students lab report, quizzes
    or projects
  • Do not copy someone elses work found on the
    Internet
  • You can quote a sentence or two, but put those in
    quote and give reference

26
Consequences for Cheating
  • You get 0 credit for the task you have cheated
  • If the task is worth more than 25 of the course,
    it is considered a major infraction
  • Otherwise, it is considered a minor infraction
  • For major infraction and repeated minor
    infractions
  • You will get an F grade, and
  • You may be suspended or repulsed from CSU
  • CSU Code of Conduct
  • http//www.csuohio.edu/studentlife/StudentCodeOfCo
    nduct.pdf

27
Reference Texts
  • Andrew S. Tanenbaum
  • Computer Networks
  • 4th Edition (or later), Prentice-Hall, 2003
  • James F. Kurose, Keith W. Ross,
  • Computer Networking A Top-Down Approach
    Featuring the Internet
  • 3rd Edition (or later), Addison-Wesley, 2004

28
Additional Information
  • Anonymous email
  • teachingcsu_at_gmail.com
  • Password
  • if you are not happy, please do let me know
  • Course Web site
  • http//academic.csuohio.edu/zhao_w/teaching/EEC584
    -S09/eec584.htm
  • Lecture notes will be posted
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