Date: Wed, 16 Jan 2008 16:16:11 -0600 (CST)
   From: Mark Jacobson <jacobson@math-cs.cns.uni.edu>
     To: 810-023-01-spring@uni.edu
Subject: Readings and WRT 112 lab on Friday...

Hi 023 students,

     Please read over Exercise 1.1 Examining a Quiet Network with Ethereal
                  and Exercise 1.2 Protocol Layering.

     Pages 1 through 29 for these two "chapter" of our textbook.

     The concept of "Promiscous Mode" is explained on page 6.

     Today you saw the Protocol Pane and the Raw Pane in action during
     class.  Know those two terms before Friday (page 11 of book).

     The List Pane should also be known.  Which Pane is used to determine
     what packet we see in the other two Panes?

        List or Protocol or Raw?

     Protocol Layering is explained in 1.2 and page 17 shows a very nice
     diagram of the 7 layer model and compares it to the TCP/IP 4 layer
     model (also called a Stack or the Internet Protocol Stack model).

     What are the two most common TRANSPORT layer protocols?

     Which of these two is the more reliable?

     What are the two main things that are in an Ethernet Header?

     Please Do Not Throw Sausage Pizza Away

     Which OSI layer is the Ethernet Header associated with?  Name it.
       You will see Src: and Dst:

     Which OSI layer are port numbers associated with?  You will see
       Src Port: and Dst Port: as you read and look at the diagrams
       and Ethereal snapshots in chapter 1.2 Protocol Layering.

     Which OSI layer are IP numbers associated with?
        You will see Src Addr: and Dst Addr: in the appropriate Pane
        as you look at the Ethereal screen snapshots in the book.

     The class web page is at:

             http://cns2.uni.edu/~jacobson/c023.html

     Please look over the IP Packet Format diagram at

     http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/ip.htm#wp4148

     Please look over the TCP Packet Format diagram at

     http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/ip.htm#wp3664

     Please look over the UDP Packet Format diagram at

     http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/ip.htm#wp1375

     Which of the 3 is the simplest diagram?

                              ----------
     We will look at these in WRIGHT 112 lab class on Friday.
                              ----------

     The class web page is at:

             http://cns2.uni.edu/~jacobson/c023.html

     Mark