Embed Size (px)
DESCRIPTION
Class 04 – Networking. What is a computer network? How does TCP/IP work? Useful tools to understand the network. Creative activities with the network. Class 04 – Networking. Take a look of the network in the classroom, a local area network. Class 04 – Networking. The equipment Cable - PowerPoint PPT Presentation
Citation preview
Class 04 – Networking
1. What is a computer network?
2. How does TCP/IP work?
3. Useful tools to understand the network.
4. Creative activities with the network.
Class 04 – Networking
Take a look of the network in the
classroom, a local area network.
Class 04 – Networking
The equipment
Cable
Switch/hub
Router
LAN
Class 04 – Networking
Ethernet adaptor
Wi-fi (WLAN)
MAC address
IP address
Class 04 – Networking
Find out your own address
1. MAC address
2. IP address
Class 04 – Networking
Find out your own address
1. MAC address
2. IP address
ipconfig /all
Class 04 – Networking
ipconfig /all command
Class 04 – Networking
MAC address00:03:93:11:f7:60
The manufacturers listhttp://anonsvn.wireshark.org/wireshark/trunk/manuf
Class 04 – Networking
IP address
192.168.1.101
144.214.26.168
Class 04 – Networking
Compare your IP address with your
classmates’.
What is the relationship?
Class 04 – Networking
Try to go to this website at IE
http://144.214.26.168/index.html
Class 04 – Networking
What can you find out about the IP
address?
Class 04 – Networking
Try out something similar with IE this
time at
http://sweb.cityu.edu.hk/index.html
Class 04 – Networking
What is the relation between
sweb.cityu.edu.hk
144.214.26.168
Class 04 – Networking
How do you know the IP address of the
CityU website?
www.cityu.edu.hk
Class 04 – Networking
Try a ‘ping’ command.
ping www.cityu.edu.hk
Class 04 – Networking
ping command
Class 04 – Networking
Try a ‘nslookup’ command.
nslookup www.cityu.edu.hk
Class 04 – Networking
nslookup command
Class 04 – Networking
Where is www.cityu.edu.hk?
A trace route command.
tracert www.cityu.edu.hk
Class 04 – Networking
tracert command
Class 04 – Networking
We go to the network information centre
at
http://www.apnic.net/
Class 04 – Networking
For a visual representation of the path,
you can use VisualRoute at
http://visualroute.visualware.com/
Class 04 – Networking
Geo IP – tagging the geographic
information into your IP address.
Commercial applicationhttp://www.ip2location.com/
Open applicationhttp://www.hostip.info/
Class 04 – Networking
Find a place, organization, company you
are interested in and use the above tools
and any web search engine to find out as
much information as you can about it in
terms of networking.
Class 04 – Networking
Alternate browsing
The telnet command.
Class 04 – Networking
Try out this
telnet sweb.cityu.edu.hk 80
Class 04 – Networking
Don’t be afraid if you have nothing.
GET /index.html HTTP/1.0
Class 04 – Networking
What can you do with it?
Potatolandhttp://www.potatoland.org
I/O/D Web Stalker
http://www.backspace.org/iod/iod4Macupdates.html
Class 04 – Networking
Web Stalker
Class 04 – Networking
Alternate browsing – web stalker
A simple demonstration in Director.
Class 04 – Networking
Browse all the websites in the world.1:1, 1999/2001 Lisa Jevbratt,
http://jevbratt.com/projects.html
Class 04 – Networking
Obtain information from public web
pages.
Weather information
Finance information
http://www.hko.gov.hk/contente.htm
http://hk.finance.yahoo.com/
Class 04 – Networking
Automate the information retrieval
process.
Flash MX application
Class 04 – Networking
Remember the fun.
http://webcast2.info.gov.hk/2005/0110a.wvx
Class 04 – Networking
Alternate browsing
Class 04 – Networking
Have more fun!
Class 04 – Networking
Stock Market Skirt 1998, Nancy Paterson
Class 04 – Networking
What is moving under your table?
Class 04 – Networking
What is moving under your table?
Information, data, packet
Class 04 – Networking
Take a look of the packet
CarnivorePE
What is the Carnivore?
Class 04 – Networking
Carnivore/DCS1000
Class 04 – Networking
CarnivorePE
Class 04 – Networking
CarnivorePE
By Radical Software Group (RSG)http://r-s-g.org/
Class 04 – Networking
Get a copy of it from
http://r-s-g.org/carnivore/
Class 04 – Networking
A simple demonstration using
1. A telnet client
2. A Flash 8 client
Class 04 – Networking
Your first assignment will be based on
the Flash 8 client.
Design a CarnivorePE client with Flash
using the packet information detected.
We are going to work on it next week.
Show us in week 7
Class 04 – Networking
Echelon is a larger project among a
number of western countries.
Echelon is the worldwide signals intelligence network run by the US National
Security Agency and the UK Government Communications Headquarters in
collaboration with Canada, Australia and New Zealand. Echelon uses large
ground-based radio antennae in the United States, Italy, the UK, Turkey, New
Zealand, Canada, Australia, and several other countries to intercept satellite
transmissions and some surface traffic, as well as employing satellites to tap
transmissions between cities.
From Simon Biggs’s artist statement
Class 04 – Networking
Simon Biggs creates an artwork using the
same name - Echelon
It simply employs all the words stored in the Echelon system in a program that
automatically generates texts using whatever dictionary it has available.
Whenever a user moves their mouse over a text it will automatically re-write itself
as a new text. It will then e-mail that text to a random e-mail address (this last e-
mailing component of the work is currently disabled, but will be enabled by the
artist at the appropriate time - the effect will be to flood the net with echelon
sensitive messages at the rate of hundreds per minute, depending on user
interaction).
From Simon Biggs’ artist statement
http://hosted.simonbiggs.easynet.co.uk/
Class 04 – Networking
Echelon
Class 04 – Networking
Livewire 1995, Natalie Jeremijenko
Class 04 – Networking
Remember this?
Class 04 – Networking
Remember this?
Class 04 – Networking
Life Sharing, 0100101110101101.org
