||Enrollment, course mailing list, and
||This class is currently over-enrolled.
We will hand out another sign-up sheet during Monday's class after which
we will make a decision about how to proceed with the class. We would like
to start using the course mailing list, firstname.lastname@example.org,
as soon as possible to disseminate information to the class. If you wrote
your email address down on the signup sheet during the first lecture, we
have already added your name to the list. If you are interested in taking
this class and your name is not on the list, please subscribe to the mailing
list no later than 5pm on 9/9/99. You can subscribe/unsubscribe from the
mailing list in one of two ways:
We will place course notes outside of NE43-514
some time on 9/9/99, and we will send out mail as soon as they become available.
# blanche 6.892-students -a username
on Athena (or -d to delete). You can find more information about using
Athena mailing lists through Athena's on-line
If you don't have access to Athena, feel free
to send mail to Joanna at email@example.com,
and she will make the appropriate changes to the list.
||Copies of course handouts are now available
outside of Laura Blackler's office, NE43-514.
||Homework, tutorial, projects
||1. On Homework 1, part (c), assume that
the CRC system is pipelined at the sender and can process 32-bits of data
at a time. The system is not pipelined at the receiver. Why? Using this
assumption, calculate the delay for a single 1024-byte packet.
2. Please note that Homework 1 is due next
Wednesday, 9/22. A previous version of the schedule listed the due date
as 9/20. Thanks to those of you who pointed out the error.
3. A reminder that Joanna will be giving
a tutorial on the ns simulator this Friday in NE43-518, from 2-3pm. Homework
2 will include several problems that make use of the ns simulator, so you
are highly encouraged to attend. If you can't make it to the tutorial,
not to worry, there is an on-line tutorial on the web. We will post more
information about this tutorial and other useful ns pointers on the course
4. We will hand out project suggestions
in class next Monday. You need to start looking for project partners as
soon as possible. If you have a particular project that interests you,
but you dont' have a partner, feel free to use the course mailing list
to advertise for partners. If you have tried everything and can't find
a partner, turn in your name on the day that project partners are due,
some projects that you are interested in, and we will do our best to match
you up with someone else.
||ns on Athena
||Homework 2 will include several
problems that make use of the ns simulator. Note that we
have added a new page to this site containing information on using ns on Athena. This page is also accessible from
our useful links page.
For those of you who are using tcpdump on Athena to do problem
set 1, we have a correction for part iii of problem 8. Athena's tcpdump
does not seem to understand abbreviated host names in its filter expression.
You should therefore run the following filters to produce "wind.txt" and
tcpdump -N -r ftp.tr host wind.lcs.mit.edu and port ftp-data > wind.txt
tcpdump -N -r ftp.tr host breeze.lcs.mit.edu and port ftp-data > breeze.txt
Apologies for the late notice and thanks to Rafa Nogueras for pointing
this bug out to us! :)