Presentation is loading. Please wait.

Presentation is loading. Please wait.

Teh Intarw3bs Or becoming better informed users of the Internet.

Similar presentations


Presentation on theme: "Teh Intarw3bs Or becoming better informed users of the Internet."— Presentation transcript:

1 Teh Intarw3bs Or becoming better informed users of the Internet

2 Networks 146 BC - Greeks use torch signals 1830s - Electric telegraph 1870s - Telephone 1920s - AM radio 1930s - Television 1960s - FM radio 1970s - Computer networks

3 The Internet? A network of networks Companies, schools have their own networks E-mail, the World Wide Web, FTP are ways of sending info over the Internet

4

5

6 Why the Internet? Military: ARPANET 1969 First version of todays Internet in 1983

7 The WWW One of many services on the Internet A series of documents connected through links Started ~1990 Accessed through a web browser

8 HTML? Hypertext Markup Language Defines the structure of a web page This is a heading A sub-heading This is a paragraph!

9 How does the WWW work? I figure out the address of where the info I want is I make a request to the server The server sends back my info (A server is any computer that can send out data in response to a request)

10 Blue Scholars on MySpace Lets check out the Blue Scholars MySpace page www.myspace.com Give me the Blue Scholars page! Ok here it goes: // Blue Scholars on MySpace Music - Free Streaming MP3s, Pictures & Music Downloads MySpace.Ads = {};MySpace.Ads.Account = {"Type":"7"};MySpace.Ads.BandType = {"Genre1":"21","Genre2":"22","Genre3":"92","LabelType":""};MySpace.Header = {}; MySpace.Header.IsTrueGlobalHeaderEnabled = false; MySpace.Header.Navigation = {};MySpace.Header.Navigation.OnAfterRender = function(){}; MySpace.ProfileClientContext = {"ProfileType":7,"ProfileVersion":1,"PrivateToUser":false}; http://x.myspacecdn.com/modules/sitesearch/static/rdf/profileschem a.rdf#obrowsecaching":0,"msplpe="text/javascript">MySpace.Ads = {};MySpace.Ads.Account = {"Type":"7"};M/script>

11 Wheres MySpace?!

12 IP addresses Every computer on the Internet has a unique address (ex.: 74.125.67.100) Domain Name Servers (DNS) map names to addresses You: 67.171.16.158 Wheres myspace.com? 216.178.38.116 myspace.com: 216.178.38.116 Wheres www.myspace.comwww.myspace.com www.myspace.com: 63.135.89.46 63.135.89.46 DNS server: 208.67.222.222 Give me the Blue Scholars page Ok, here it goes!

13 Searching

14 A bunch of links and words Crawlers or spiders look at pages Extract all words and links Stores them in a table, much like the index of a book When you make a query, its looked up in the table

15 Page Ranking A page is important if a lot of important pages link to it Entire Internet gets to vote

16 Next few days Creating web pages lab - hit and run intro Networking lab - hit and run intro FINAL PROJECT ~2.5 weeks to work on technology of your choice! Individual or in pairs ~5 min presentation on last day.


Download ppt "Teh Intarw3bs Or becoming better informed users of the Internet."

Similar presentations


Ads by Google