class 04 – networking

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?

How can you go there?

Class 04 – Networking

Where is www.cityu.edu.hk?

A trace route command.

tracert www.cityu.edu.hk

Class 04 – Networking

tracert command

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Who is www.cityu.edu.hk?

A whois 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

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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

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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