topic # Topic Reading Homework Slides
1 administrativa

tour of class website

introduction to Wireshark

OSI network stack model as metaphor for this course

"top down" vs "bottom up" approaches

UCLA professor Kleinrock on starting the internet

Layered network model, from Stanford's open courseware

About DARPA from "Air Talk" show on KPCC 2/15/10

read - textbook
 - chapter 1
 - chapter 2
 - chapter 3, 3.1-3.12 only

 - Appendix 1 up to p 570 (ed. 5) or 602 (ed. 6) only
(preview and basis for in-class exercise at link entitled "simplified client/server" below)

read - the central column on the home page, with its various announcements, policies, recommendations, and information

transfer - a text file named "introduction.txt". You have an account on sputnik.smc.edu. I want you to know how to transfer a text file to your home directory there. Create one that declares your name, e.g. "My name is David Morgan," and says something (short) about you. "I like the good L.A. weather and chocolate ice cream." The file must be a text file, not some other format like .doc or .pdf. The purpose is to make sure you know how to transfer files, since I will you to submit some homework this way. See: Remote Unix system account  

recommended (though not required) - print and carry the "TCP/IP Pocket Reference Guide." It's a good thing to have at hand throughout the semester for quick examination. It's unfamiliar information you need to learn that will be referred to often. You might want to print it 2-sided and fold it in 3 panels triptych style for frequent reference while studying.

examine - the 1987 document at the link entitled "TCP/IP - Intro to the IP Protocols." I want you to read it over the course of the semester. You will understand it increasingly as we proceed. Start now (and see how much you do, and don't, yet grasp).

install - the Wireshark tool on your computer if you can and wish. It is centrally important and you must learn how to use it. However, if it is not on you own computer, it is on the virtual machine you will install on your computer so you will be able to learn Wireshark on the virtual machine's copy.

learn to use Wireshark - make a screenshot of Wireshark's main interface after it's running and has captured something (anything). Put the screenshot in a file named wireshark.jpg or wireshark.png. I will ask you to transfer that file to me later.(Purpose: to prove that you know how to use the tool.)

listen - to the audio at the links shown in the "Topic" column at left (Kleinrock, layering model, Air Talk featuring DARPA).

Network stack

Suites & layers

 

2 protocols, rfc's

client/server model
in-class exercise(s):
 simplified client/server   (textbook Appendix 1)

in-class exercise(s):
 tcpdump/wireshark


read - textbook
  ch 5 Overview of Data Communications
-  

wireshark

3

 

ethernet

historical perspectives on networking
 Andrew Tanenbaum in 1981 and/or
 PBS "Nerds: a Brief History of the Internet"

in-class exercise(s):
  wireshark - parts 1, 2, 3, 4,7,and 8

read - textbook
  ch 6 Information Sources and Signals
   ch 15 Wired LAN Technology (Ethernet and 802.3)
do - the exercise at the link entitled "wireshark" in the "Topic" column at left labeled as an in-class exercise.

examine and start - ethernet frames

Ethernet, a protocol example

4

ethernet

demo, clarify remote access purposes/methods
 - login session
     by command line (ssh)
     by GUI (putty)
 - file transfer
     by command line (scp)
     by GUI (FileZilla)

representing numbers in binary (short review)

Signals

in-class exercise(s):
  MAC addresses
  MAC spoofing

read - textbook
  ch 7 Transmission Media
  ch 13 Local Area Networks: Packets, Frames, and Topologies


do - ethernet frames

listen - to Bob Metcalfe talk about inventing ethernet.

view videos:
Fiber-optic cables: how they work

Wires, cables, and wi-fi

What is the internet, really?

 

Ethernet, a protocol example

Transmission media (Ch7)

 

 

 

5

 

IP - interfaces, addresses, and routes


discussion of net-addr+mask=network
 ipcalc/calculators
 Real-world DSL

transmission media

in-class exercise(s):
 netmask legality
 netmasks' size effect
 ifconfig/route

read - textbook
  23 Support Protocols and Technologies (about arp protocol)

  - two and a half pages from "Introduction to the Internet Protocols". Sections 2.2 and 2.3, about IP and ethernet.

  - some supporting reading about arp.

do - netmask legality

 

Signals (Ch6)

Interfaces & Routes

 

6 arp

Packet delivery (to routers, for locally  unavailable destinations)

in-class exercise(s):
 capture arp/ping session 

read - tcpdump filter examples

read - textbook
  ch 17 Bridges/switches

article about switch functionality

do - tcpdump filters

listen - to this podcast segment about packet delivery (harry & sally)

listen - recorded 1-hour demo
 hub vs switch
 (they forward differently)

tcpdump

ARP address resolution

IP packet delivery

7 IP addresses

IP exhaustion - IPv4Paucity


read - textbook
  ch 22 Datagram Forwarding
  ch 21 IP Internet Addressing

read - Masks, routing, subnets

view - Subnet mask chart

visual analogy - a router

do - subnet partitioning

do - IP packet delivery

do - MAC vs IP addresses per instructor's supplementary formatting and submittal instructions.

do - network topology to connect a classroom to the internet

 

IP Addresses

internetworks
 (narrated version)

 

8 in-class exercise(s):

internetworking
 (physical lab version)

internetworking - VirtualBox version

read - textbook
 
ch 20 Internetworking Concepts
 

exercise on internetworking  on VirtualBox

exercise on internetworking on DETER

 

-

9

demo/explanation of DETER exercise on internetworking

error detection

- error detection

listen - to this podcast segment about checksums

Reliability from unreliable parts:
read about - The End-to-end Principle

 

 Error detection

10 demo - hub vs switch

(transmission media - catching up)

services (xinetd)

socket api

port forwarding

 

read - about socket API programming

 
read - textbook's chapter 3 about network programming, sections 3.13-3.23. (You already read up through section 3.12. Review those sections again.)

Brown p56, port forwarding

view diagram hub vs switch

study - the code for the "world's simplest client-server pair": 
 - letter-upgrader server
 - letter-upgrader's client
They exemplify the stucture of client and server programs through their use of the socket API. For contrast with them, take a quick look at the other two pairs,
 - upper-echoback server
 - client for echo-back server
and
 - web (file-send) server
 - client for file-send server
,
which are a little more complicated but also reflect the standard socket programming structure. Satisfy yourself that you can identify the structure within those other two pairs.

Networks: services

Networks: sockets

Port forwarding methods

 

11

test

socket api

 

udp

tcp

 

above

read - textbook
  dh 25 UDP
  ch 26 TCP

packet loss may be just fine
 good semantics despite bad syntax

-
 

Networks: sockets

 

udp protocol

tcp protocol

 

Networks: protocol interrelationships

12 in-class exercise(s):
 directed use of  letter-upgrader sample programs

 xinetd - the "super server" or "server manager" 

Utilities

ping/icmp

traceroute

nmap

netstat

netcat

in-class exercise(s):
 nmap scanner

 

read - the Ethical Hacker article about nmap

Brown  pp151-155, netstat

traceroute sample 1

traceroute sample 2

traceroute sample 3

 

ping
  listen - to this lecture about ping (16MB)
  meet - the guy who wrote it (r.i.p.)
  read - his account of the ping story.

traceroute
  listen - to this podcast segment about how it works
   (or equivalently read from its written transcript, page 24 "There's another field..." to page 25 "...over the net.")

netstat
  listen - to this lecture about netstat (30MB)
  listen - to a discussion of netstat (starting from about 14:00 min)
   (or equivalently read from its written transcript, from page 7 "Oh, it started there..." to the end)

xinetd - the "super server" or "server manager"

nmap scanner

examine an nmap cheat sheet - here's a quick reference card for nmap.

ping
 (narrated version)

traceroute
 (narrated version)

nmap

netstat
 (narrated version)

netcat

 

 

13 name service, dns protocol as implemented by BIND

in-class exercise(s):
 dns name server
 (physical lab version)

dns name server - VirtualBox version

 

 


 

read - textbook
 ch
4 Traditional Internet Applications

listen - to the dns training video in file dns.avi. (You can also get it from the remote server. It's about 13MB.)

BIND (name server)

DNS protocol

 

14

 

web service, http protocol as implemented by apache

in-class exercise(s):
 apache web server

apache web site
apache documentation

a summary how CGI works [link died]

examine an Apache cheat sheet - here's a quick reference card for Apache. It's formatted to be printed out as 2 pages, front-to-back on a single sheet, then folded tri-fold.

do - view a copy of the green-background webpage found as a name-based virtual server, at 107.193.80.65, when addressed by the name emach1alter.linnet.edu. Use what you learned in the in-class exercise at the link entitled "apache web server". You can do it from a Windows machine instead of linux if you want. Windows machines maintain hosts files as do linux ones, with the same purpose and effect. While the linux one is /etc/hosts, the Windows functional equivalent C:\WINDOWS\system32\drivers\etc\hosts.
 - turn in a printout of the page

Apache (web server)

HTTP protocol

Apache CGI

 

additional
slides
these are for reference, on topics we do not expect have time to formally cover

Access technologies (Chs. 12+16 abridged)

Wires, hubs, switches

bridging

dhcpd (address server)

DHCP protocol

Samba (MS fileshare client) 

SMB (MS fileshare) protocol

Networks: miscellaneous essentials