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Administrativa
Reading
list, per chapter:
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FALL
2021 This Website (http://classpage.dmorgan.us/) will be used extensively to communicate with you. Announcements, grade reports, and assignments will be posted here. You are responsible for awareness of the information posted here. Announcements/grades/current topics
Homework - Undersea cabling - former
student Philip Postovoit did the service of researching cabling quite
thoroughly. Of the many links
about it he sent me, I found particularly interesting:
(9/16) What other data link protocols
besides ethernet are out there? You might instead have
What's the difference? Norm Abramson 4/1/1932 - 12/1/2020
(9/16) Grades - have been published, at the link entitled "Grade reports" at left. They include the "exercising wireshark" assignment in addition to the initial wireshark screenshot upload. There is a cumulative (weighted) average of these two. The cumulative average will be maintained to incorporate future work, assignment by assignment as they are completed, over the semester. Please look yourself up by the same anonymous 5-digit value you derived in calculating your sputnik remote server password. Please call any anomalies to my attention. (9/16) Grades - have been published, at the link entitled "Grade reports" at left. Please look yourself up by the same anonymous 5-digit value you derived in calculating your sputnik remote server password. Please call any anomalies to my attention. (9/13) By popular demand - at least 2 students in class tonight expressed interest in this bash cheat sheet (summary by a former student of things you can do using the command line in linux or mac). (9/9) Green light - go ahead and download the vmconfigure scripts for your platform ("bash" version for linux/apple, "batch" version for Windows). In class tonight I had asked you to wait till I could test and confirm them. I did. They are OK. They serve to set up machines for your wireshark homework, below. (9/9) Homework statistics-udp.jpg (or .png) I ask you to place these into a zip file named "wireshark-homework.zip" and upload it to your assignments directory. (Please ignore the questions you will see at the bottom of the assignment page. They are not for you. I only want the screenshots.) due on sputnik in the "assignments" subdirectory of your home directory end-of-day Wednesday, September 15 (9/9) RFC process - how protocols get created. Here is a current example, HTTP 2 which was published as an RFC in May, 2015. See in particular the development timeline that has led it to this point. (9/9) Screenshot of Microsoft Network Monitor. Compare the interface with Wireshark's. It demonstrates the product category (network "sniffers") to which both products belong.
(Network Monitor comes with the Server editions of Windows and won't be found in our consumer editions.) (9/9) Remote server access how-to video. Several programs that provide login connection to a remote server, file transfer connection, or both, are discussed and demonstrated. These are the tools for accessing sputnik.smc.edu. (9/3)
Homework - Opportunity - ICANN (Internet Corporation for Assigned Names and Numbers) "Shaping the Future of the Internet: ICANN's Newcomer Programs" (8/30) Opportunity - NASA community college aerospace scholars program (8/30) Course outline - with rough weekly topic coverage corresponded to related readings, homework assignments, and in-class slides I will use. Please follow this outline as we move through the topics, for assignments and reading I want to assign. A virtual machine (VM) for you
- hands-on lab exercises will be performed on a virtual machine that
you can run in your own computer. A Remote Unix system account is available for your use. Using ssh (secure shell). ssh is an important tool you will use for interacting with remote computers. For that you will need an ssh client. There are a number of ssh client alternatives. Distributing files from sputnik to the class as a whole, publicly - the above file transfer discussion describes file movement to and from your own home directory, exclusive to you. Sometimes I will want to have someplace to put a file so everybody can get to it and download it. When I do that, here's how to download them. Dates and deadlines Cover art on Tannenbaum textbook:
What is it?? "Number please?" asks the switchboard operator. The switchboard is a board. It's for switching. Switching changes a circuit between you and somebody. It can complete a circuit to your Aunt Bheulah in Iowa City so you can thank her for the knit socks. After you hang up if you want to call your uncle in Waco you'll need to switch circuits, to get a circuit to him instead of her. That's what the operator does for you. The "switch"ing in "switch"board is circuit switching. Nowadays in computer networks it's not circuit switching anymore, it's packet switching.
Functional layering - the famous "Open Systems Interconnect" model is depicted below. Somebody once had the idea that maybe there could be a way to get independent computer systems of different types to be able to exchange information with one another. The diagram blueprints the idea for "how in the world are we going to make that work??" That idea is the subject of this course.
First-day administrative information you will need to know: Slides available online - for most if not all slides I will show in class. Links to them can be found in the "Slides" column of the course outline. Course-long textbook reading - a chapter-by-chapter list ( 6th edition, 5th edition ). The textbook is divided into chapters and they in turn into numbered sections. The list tells you which sections to read for this course when chapters are assigned. For example if I assigned chapter 10 and it had 17 sections, if this list specifies "10.1-100.5, 10.7, 10.12-17" it means I didn't feel sections 10.6 nor 10.8-11 were relevant enough so I only list the balance of the chapter. Read unlisted portions for your own interest if you wish, but the listed sections are what's officially assigned to you. Textbook - Computer Networks and Internets, sixth edition, Douglas Comer, Pearson Prentice Hall , 2015. Wireshark - is an excellent free packet capture utility.
What is a packet, and why caputre it? We'll talk about that later. I
will ask you to install and use Wireshark later in the semester,
assuming you have a linux or windows computer available on which to
do so. Please visit Wireshark's
home page.
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"What
hath God wrought?"
"Mr.
Watson come here, I want to see you."
"lo"
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