Presentation on theme: "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."— Presentation transcript:
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 Who is www.cityu.edu.hk?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 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/