Class 04 – Networking

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 Switch/hub Router LAN

Class 04 – Networking Ethernet adaptor Wi-fi (WLAN) MAC address IP address

Class 04 – Networking Find out your own address MAC address IP address

Class 04 – Networking Find out your own address MAC address IP address ipconfig /all

Class 04 – Networking ipconfig /all command

Class 04 – Networking MAC address 00:03:93:11:f7:60 The manufacturers list http://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

Class 04 – Networking 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 application http://www.ip2location.com/ Open application http://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? Potatoland http://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 A telnet client 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