CSCI 551 TA page, HW2 related announcements

HW2 due at 9am on Thursday, April 10

Some students wanted clarification as to which node is sending data to which other node in the network (second part of the second question of the second homework). Here is a hint: If you think about how wireless communication works, it should be enough to know that they are "sending" to answer 2e.

In the second question, When you try out case(d) with the simulator using the script, you need to make sure the nodes are equidistant before you simulate. As one student pointed out, they are not equidistant to begin with.

Yet another link to Trace file format information.

Your answer for HW2 2.b and 2.h should include an excerpt from the tracefile that you generate. Things to keep in mind:

• It is not enough to just slap a portion of your tracefile in the answer and expect to get a full credit. Please explain what is in that excerpt.
• Please do not include your entire tracefile. It will be too long for me to read it all. Please include as few lines as is needed to support your answer. I would be surprised if you had to include more than 5 lines of trace. The trace excerpt that you include in your answer does not have to be contiguous -- feel free to delete the lines that are irrelevant to your answer.

When you are logged in to aludra/nunki or other Sun's, you can run ns and nam installed in csci551 course account using the following commands:

~csci551/ns yourfile.tcl
~csci551/nam yourfile.nam

Here are the scripts mentioned in HW2:
hw2q2b.tcl hw2q2g.tcl

The second file is mentioned as hw2q3g.tcl (typo) in the homework itself.

Information on wireless trace format.