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Unit 5: Text Transport Using UCP and TCP   This unit will introduce you to new programming skills – more specifically, programming skills on the transport layer of the TCP/IP stack.  This unit will begin by providing you with a layered view of the Internet, focusing on the UDP and TCP protocols in the TCP/IP stack.  We will then learn how text can be sent over the network and identify the principles of creating UDP datagrams or TCP segments, packaging text, and transferring it from one machine to another across the network.

Unit 5 Time Advisory
This unit should take you approximately 10 hours to complete.

☐    Subunit 5.1: 3 hours

☐    Subunit 5.2: 3 hours

☐    Subunit 5.3: 3 hours

☐    Subunit 5.4: 1 hour

Unit5 Learning Outcomes
Upon successful completion of this unit, the student will be able to:

  • Explain the fundamental concepts of programming for the transport layer.
  • Differentiate the coding methods for writing and reading across machines.
  • Compare and contrast methods for input and output streaming.
  • Complete programming tasks utilizing different streaming methods.

5.1 Internet Basics  

  • Reading: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Section 11.4: Networking” Link: Hobart and William Smith Colleges: David J. Eck's Introduction to Programming Using Java: “Section 11.4: Networking” (PDF)
     
    Instructions: Please read all of Section 11.4, which provides an overview of networking.  Programming for client-server data transport is discussed.  Be sure to test the sample code included in this section.

    Terms of Use: The article above is released under a Creative Commons Attribution-Non-Commercial-Share-Alike License 3.0.  It is attributed to David Eck and the original version can be found here.

5.1.1 Application Layer  

  • Reading: Oracle's “What You May Already Know about Networking in Java” Link: Oracle's “What You May Already Know about Networking in Java” (HTML)
     
    Instructions: Please read the “What You May Already Know about Networking in Java” tutorial.  This tutorial covers basic application development for networks. 
     
    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

5.1.2 Networking Basics: TCP or UDP?  

  • Reading: Oracle's “Networking Basics” Link: Oracle's “Networking Basics” (HTML)
     
    Instructions: Please complete the Networking Basics reading as a review of network communication layers.  Note the comparison and contrast of TCP with UDP.  What is a port?   
     
    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

5.1.3 Internet Addresses in Java  

  • Reading: Oracle's “Working with URLs” Link: Oracle's “Working with URLs” (HTML)
     
    Instructions: Please complete the “Working with URLs” tutorial as a review of the network addressing convention.  Follow each of the six links completing the material provided at each link.  The sample code at each link reveals how a lot of the Internet functionality is actually coded and reveals its dependency on the sending or receiving computer's address.
     
    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

5.1.4 Sockets  

  • Reading: Oracle's “All about Sockets” Link: Oracle's “All about Sockets” (HTML)
     
    Instructions: Please complete the “All about Sockets” tutorial for an understanding of how client-server processing occurs on the Internet.  Follow each of the three links completing the material at each link.  What is the client machine class called?
     
    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

5.2 Text Transport Using User Datagram Protocol  

  • Reading: Oracle's “All about Datagrams” Link: Oracle's “All about Datagrams” (HTML)
     
    Instructions: Please complete the “All about Datagrams” tutorial for an understanding of how UDP processing occurs on the Internet.  Follow each of the three links, completing the tutorial at each link.  Compare and contrast sample client-server processing in the TCP example in the preceding subunit with the client-server processing in this tutorial using the wireless connection.
     
    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

5.3 Network Interfaces  

  • Reading: Oracle's “Programmatic Access to Network Parameters” Link: Oracle's “Programmatic Access to Network Parameters” (HTML)
     
    Instructions: Please complete the “Programmatic Access to Network Parameters” tutorial for an understanding of the network interface class.  Follow each of the four links completing the tutorial at each link.  Describe a situation where you might use the network interface. 
     
    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

5.4 Cookies  

  • Reading: Oracle's “Working with Cookies” Link: Oracle's “Working with Cookies” (HTML)
     
    Instructions: Please complete the “Working with Cookies” tutorial for an understanding of managing cookie classes and interfaces.  Follow each of the four links completing the tutorial at each link.  Describe a situation where a website you recently visited might have used a cookie class and/or interface.
     
    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.