CNT 4713

General

• Syllabus
  • Section 01
  • Section 02
• Exam Information will be posted here prior to exams. Check the Moodle calendar for exam dates.
  • Quiz 1 will be on Wednesday, September 21. It will cover python and questions from the ends of chapters 1 and 2.
    • Chapter 1 Review Questions: except R6 and R10.
    • Chapter 1 Problems: P3, P4, P6, P8, P10, P13, P20, P24, P25, P31. Some of these were covered in class.
    • Chapter 2 Review Questions: R1 - R19, except R18.
    • Chapter 2 Problems: P1, P4, P5, P10, P11, P14, P15, P17.
    • Python: The concepts needed to write a program that makes change. It accepts a number of cents and displays the number of dollars, quarters, dimes, nickels, and pennies that it is equivalent to. The program should loop until a negative number of cents has been entered. Use methods and exception handling.
  • Exam 1 will be on Wednesday, September 28. It will cover chapters 1 and 2, along with CGI programming and web basics.
    • All topics and links on this page that look like this
    • All topics from Chapter 1 of the book
    • All topics from Chapter 2 of the book
    • All topics from the first 15 pages of the web basics reference
    • All topics from Homework 1
    • All topics from Quiz 1
    • Additional Chapter 2 Review Questions: R21 - R27, except R25.
    • Additional Chapter 2 Problems: P22 - P25, P27, P28, P31, P32, P35
    • Additional Python: UDP Client and Server, TCP Client and server. Applications that use TCP or UDP: Web server, UDP pinger, Web proxy, SMTP client.
  • Quiz 2 will be on Wednesday, 10/26. It will cover questions from the ends of chapters 3 and 9, which are listed in Homework 2.
    • Chapter 3 Review Questions: except R5 and R19.
    • Chapter 3 Problems: P1-P5, P8-P12, P14, P22-P27, P29, P31, P34-P37, P40, P43, P44, P46, P55
      • More information about cwnd.
      • Clarification about P43. P43 states that the Host A is capable of sending data into the TCP socket at a rate of S bps, where S = 10 * R. R is the transmission rate of the link. The book aslo mentions that Host A has a buffer. A better description is that Host A is capable of sending data into the buffer at a rate of S bps and the buffer can send data into the link at R bps.
  • Quiz 3 will be on Wednesday, Nov 30. It will cover questions from the ends of chapters 4, 5 and 8, which are listed in Homework 3.
    • Chapter 4 Review Questions: Several of the questions refer to virtual circuits; we did not cover them. You may omit the parts of any questions that refer to virtual circuits (VC). R1, R3, R8-R12, R15-R19, R21-23, R32, R33.
    • Chapter 4 Problems: P7, P9, P24-P28, P30-P32, P34, P42-P44, P46-P48
    • Chapter 5 Review Questions: R1-R3, R5-R12.
    • Chapter 5 Problems: P1-P6 P7, P11, P14-P17 -P19, P21, P22, P26, P31
    • Chapter 8: R1, R3, R5-R10, R13, R15, R16, R19, R20. Correction: R5 should read 8-bit block cipher.
    • Chapter 8 Problems: P1, P3, P5, P8, P12

  • Chapter 4 Sections

    • 4.1
      • 4.1.1
    • 4.3
      • 4.3.1
      • 4.3.2
      • 4.3.3
      • 4.3.4
    • 4.4
      • 4.4.1 - Skip fragmentaion
      • 4.4.2 - Only Network Address Translation (NAT)
      • 4.4.3
      • 4.4.4
    • 4.5
    • 4.6
      • 4.6.1
      • 4.6.2
      • 4.6.3 - Through BGP Basics
      • 4.6.4
      v
    • 4.7
      • 4.7.1

    Chapter 5 Sections

    • 5.1
    • 5.3
    • 5.4
    • 5.7

  • Exam 3 will be during finals week. Check the Moodle calendar and your Panther Soft schedule for the time for your section. It will cover chapters 4, 5, 8, 6, and 7.
    • All topics from Quiz 3
    • Homework 3
    • Extra Credit 5
    • Additional Review Problems Since Quiz 3.
      1. Chapter 6: R3, R4, R6, R7, R11 (spoofed destination MAC address).
      2. Chapter 7: R1-R4, R6, R8, R9, R12-R14.
    • Additional Problems Since Quiz 3.
      1. Chapter 6: P1-P4.
    • List of notes from the in-class lectures:
      • Section 01: ch4_4-1_4-4_01, ch4_intro_01, ch4_4-5_01, ch4_4-7_01, ch5_5-1_01, ch5_intro_01, ch4_4-5_01_dup, ch5_5-2_01, ch4_4-6_01, ch5_5-3_01, ch5_5-4_01, ch8-01, ch8_intro_01, ch8_ssl_01, ch6_01, quiz3_review_01
      • Section 02: ch4_4-1_4-4_02, ch4_intro, ch4_4-5_02, ch4_4-7_02, ch5_5-1_02, ch5_intro_02, ch4_4-5_02_dup, ch5_5-2_02, ch5_5-3_02_real, ch4_4-6_02, ch5_5-4_02, ch5_5-4_02_redo, ch6_intro_02, ch8_intro_02, ch8_02, ch8_ssl_02, ch6_02, quiz3_review_02,
    • List of notes from the video lectures: ch7-7_1-7_3.

On-line resources

• Moodle
  • Moodle site, section 01
  • Moodle site, section 02
• Class Notes
  • Information
  • The password for the slides is netcentric.
  • List of lectures for section 01
  • List of lectures for section 02
  • List of video lecture notes for all sections.
  • List of video lecture notes for all sections, from previous semester.
• Textbook Site

  PowerPoint Slides

  The powerpoint slides are very good. You can read them faster than I can read them to you. I expect you to read the power point after you have read a chapter.

  Student Resources

  The student resources are excellent. They include applets, practice exercises, lab outlines. I expect you to take advantage of all of these resources.

• Guide to Web Development with Java. Access the Look Inside feature from the Amazon page for this book. Read pages 1-18, which is all that is available in the Look Inside.
  • Video on HTML basics
  • Video on hypertext links and query string
• Python Resources
  • Python Tutorial at sthurlow.com
  • Python Docs
  • Python Tutorial at Brandeis

Assignments

• Homework 1: I will review questions from the homework on Monday, 9/19
  • I have created a forum on Moodle for posting and answering questions about HW1.
  • Chapter 1 Review Questions: except R6 and R10.
  • Chapter 1 Problems: P3, P4, P6, P8, P10, P13, P20, P24, P25, P31.
  • Chapter 2 Review Questions: R1 - R19, except R18.
  • Chapter 2 Problems: P1, P4, P5, P10, P11, P14, P15, P17.
  • Python: Write a program in Python that makes change. It accepts a number of cents and displays the number of dollars, quarters, dimes, nickels, and pennies that it is equivalent to. The program should loop until a negative number of cents has been entered. Use methods and exception handling.
  • The notes from the homework review are in the ch2 lecture on the Ubiquitous Presenter site.
• Extra Credit
  • Submitting Homework Online. When you are asked for a username and password, use your webmail username with the password that I sent to you.
  • Submitting Homework from Unix
  • Extra Credit 1 - cgi-bin
    Web pages
    • Creating a web folder on ocelot.
    • Python CGI Scripts
  • Extra Credit 2 - SMTP
  • Extra Credit 3 - FTP
  • Extra Credit 4 - Conditional GET
  • Extra Credit - Parse Input
    Videos
    • Notes for these videos are in the classroom from the summer, named 1605_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
    • URL decoding
    • Parsing form data
    • CGI script to process form data
• Scripts for Exam 1
  • Write a web server that implements a conditional GET, using the If-modified-since header. The web server only has to be able to return one file, but it must be an actual file. If the browser already has the file, only send the appropriate HTTP response to indicate that the browser already has the file. Request a port for your web server, so we can minimize the chance of students using the same port.
  • Modify the FTP script so that it downloads a file. First, try downloading the README.txt from the root folder. Second, list the contents of a subdirectory that has files. Third, download a file from a subdirectory.
  • Run the SMTP script and send a message to bytesizebook@gmail.com. Modify the script so that it includes a header named X-MC-Tags with the value of your FIU email username.
  • Write some pseudo code that implements a web proxy.
  • Create a web folder on ocelot named public_html in your root folder. Change the permissions to 705.
    • Change the permissions on your root folder to 701 with chmod 701 ~
    • Create a subfolder of public_html named cgi-bin. Change the permission to 705.
    • Write a CGI script on ocelot. Save it in the cgi-bin folder. Change its permission to 705. Be sure the file has a .cgi extension, not .py. Parse all the data that is sent to the form from a browser. Display each name value pair in a sentence like "The input element with name team has the value Heat". Display the request method that was used to submit the data.
    • Create a file named form.html that has two forms in it. One form uses GET, the other uses POST. The GET form should have three text elements, the POST form should have four. Both forms have an action set to your script. Place the file in public_html. Set its permissions to 604. Add a submit button in each form to submit it.
    • Open the form.html file in a browser, using the URL ocelot.aul.fiu.edu/~your-user-name/form.html. Click each button and see that the appropriate response appears for each.
• Homework 2: I will review questions from the homework on Monday, 10/24
  • Chapter 3 Review Questions: except R5 and R19.
  • Chapter 3 Problems: P1-P5, P8-P12, P14, P22-P27, P29, P31, P34-P37, P40, P43, P44, P46, P55
    • More information about cwnd.
    • Clarification about P43. P43 states that the Host A is capable of sending data into the TCP socket at a rate of S bps, where S = 10 * R. R is the transmission rate of the link. The book aslo mentions that Host A has a buffer. A better description is that Host A is capable of sending data into the buffer at a rate of S bps and the buffer can send data into the link at R bps.
  • Chapter 9: R1, R2, R4, R6, R12.
  • Chapter 9: P6, P7.
• Homework 3: I will review questions from the homework on Monday, 11/30
  • Chapter 4 Review Questions: Several of the questions refer to virtual circuits; we did not cover them. You may omit the parts of any questions that refer to virtual circuits (VC). R1, R3, R8-R12, R15-R19, R21-23, R32, R33.
  • Chapter 4 Problems: P7, P9, P24-P28, P30-P32, P34, P42-P44, P46-P48
  • Chapter 5 Review Questions: R1-R3, R5-R12.
  • Chapter 5 Problems: P1-P6 P7, P11, P14-P17 -P19, P21, P22, P26, P31
  • Chapter 8 Review Questions: R1, R3, R5-R10, R13, R15, R16, R19, R20. Correction: R5 should read 8-bit block cipher.
  • Chapter 8 Problems: P1, P3, P5, P8, P12
• Extra Credit 5
  • Submitting Homework Online. When you are asked for a username and password, use your webmail username with the password that I sent to you.
  • Submitting Homework from Unix
  • Extra Credit 5. Refer to the section on this page entitled CGI scripts that parse data and process web forms for videos that will help with the assignment.

New: Extra Credit 6

• Extra Credit 6
• Submitting Homework Online. When you are asked for a username and password, use your webmail username with the password that I sent to you.
• Submitting Homework from Unix

Video Demos

• Demo Telnet
• Demo Cookie
• Demo CGI
• Demo UDP Mod, SMTP, Dig
• Demo UDP Client and Server
• Demo TCP Client and Server
• Demo Web Server
• Demo UDP Pinger Client and Server
• Demo FTP Client
• Demo SMTP Client

Video Lectures

• Chapter 1
  • Notes for these videos are in the classroom from the summer, named 1605_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
  • Chapter 1 - Network Description
  • Chapter 1 - Packet and Circuit Switching
  • Chapter 1 - Delay, Loss and Throughput
  • Chapter 1 - Layers, Hacking and History
• Chapter 2
  • Notes for these videos are in the classroom from the summer, named 1605_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
  • Chapter 2 - Telnet
  • Chapter 2 - Telnet Example
  • Chapter 2 - Persistence
  • Chapter 2 - Persistence Example
  • Chapter 2 - Caching
  • Chapter 2 - Caching Example
• Chapter 2
  • Notes for these videos are in the classroom from the summer, named 1605_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
  • Chapter 2 - P2P
  • Chapter 2 - Sockets
  • Chapter 2 - Sockets Examples
  • Chapter 2 - Application - Web Server
• New: Chapter 2
  • Notes for these videos are in the classroom from the summer, named 1605_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
  • Chapter 2 - Ping Client and Server
  • Chapter 2 - Ping Client and Server Examples
  • Chapter 2 - SMTP and FTP Clients
  • Chapter 2 - SMTP and FTP Client Examples
  • Chapter 2 - Web Proxy Application
• Chapters 2 and 3
  • Notes for these videos are in the classroom from the summer, named 1605_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
  • Chapter 2 - URL decoding
  • Chapter 2 - Parsing form data
  • Chapter 2 - CGI script to process form data
  • Chapter 3 - Multiplexing and demultiplexing
• Chapter 3
  • Notes for these videos are in the classroom from the summer, named 1605_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
  • Chapter 3 - Multiplexing and demultiplexing
  • Chapter 3 - Reliable Transport Samples
  • Chapter 3 - Go-Back-N
  • Chapter 3 - Selective Repeat
• Chapter 3
  • Notes for these videos are in the classroom from the summer, named 1605_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
  • Chapter 3 - TCP Introduction
  • Chapter 3 - TCP Flow Control
  • Chapter 3 - ATM Congestion Control
  • Chapter 3 - TCP Congestion Control
• Chapter 4
  • Notes for these videos are in a new classroom named videos_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
  • Chapter 4, Section 4.4 - DHCP, NAT, ICMP
  • Chapter 4, Section 4.5 - Link State
  • Chapter 4, Section 4.5 - Distance Vector
  • Chapter 4, Section 4.5 - Routing loop and Heirarchical routing
• Chapter 5
  • Notes for these videos are in a new classroom named videos_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
  • Chapter 5, Section 5.2 - ECD
  • Chapter 5, Section 5.3 - MAC, SLotted ALOHA, ALOHA
  • Chapter 5, Section 5.3 - CSMA and Taking Turns
  • Chapter 5, Section 5.4 - ARP
• Chapter 8
  • Notes for these videos are in the classroom from the summer, named 1605_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
  • Chapter 8, Symmetric keys
  • Chapter 8, Public keys
  • Chapter 8, RSA
  • Chapter 8, Authentication
• Chapters 8 and 6
  • Notes for these videos are in a new classroom named videos_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
  • Chapter 8, Toy SSL
  • Chapter 8, Real SSL
  • Chapter 6, Introduction
  • Chapter 6, Wireless Networks and CDMA
  • Chapter 6, Cellular Networks
• Chapter 7
  • Notes for these videos are in a new classroom named videos_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
  • Chapter 7, Audio
  • Chapter 7, Video
  • Chapter 7, Streaming
  • Optional: Chapter 7, VoIP

Miscellaneous

• Download the following python scripts that were covered in a lecture. Run them on your machine. You can access the source through the links below, or access the ~downeyt/public_html/cnt4713/scripts folder from your ocelot account.
  • array.py
  • if.py
  • import.py, also needs numbers.py
  • import_from.py, also needs numbers.py
  • except.py
    1. Run it as it is.
    2. Create an empty file named myfile.text, then run the script.
    3. Add an integer to the file, then run the script.
• A page for accessing some python scripts: script.html.
  • Experiment with GET and POST
  • Change a cookie each time it is sent to the browser.
• Guided and Unguided Media
• Running CGI scripts on ocelot.
  • Creating a web folder on ocelot.
  • Python CGI Scripts
• CGI scripts that parse data and process web forms
  • Notes for these videos are in the classroom from the summer, named 1605_cnt4713. You will have to find the classroom and register in it. The password is netcentric. Click on the Enroll/unenroll link on the UP site and look for the class.
  • You may also want to view the videos from earlier in the course on HTML basics and hypertext links and query string.
  • URL decoding
  • Parsing form data
  • CGI script to process form data
• Active versus Passive FTP
• FTP Session Interactions
• Go-Back-N/Selective Repeat
• A different BGP NEXT-HOP explanation

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