What is the Internet Where did the Internet

What is the Internet?

Where did the Internet start? Networked computers started by Military ARPANET – 1969 experiment by the Defense department Connected 4 supercomputers During war email part became popular Soon became a problem Protocols were developed Evolved into today’s Internet

World Wide Web Internet went unnoticed for several decades 1989 – Tim Berners-Lee proposed an idea at CERN (a physics lab in Europe) Envisioned a network to organize info in pages that were connected by selectable text – hyperlinks Became popular with researchers

1993 – Graphical User Interface was introduced Mosaic released as 1 st graphical web browser Web is only part of the internet

Users People who use the services Look up telephone numbers Browse online catalogs Make purchases Download music/games Send email 2/3 of population Home, work, schools, libraries, other public locations

Internet Service Providers Who we get our service from For a fee Examples: ATT, AOL, Sprint, Earth. Link, Comcast Cable Provide access to World Wide Web, email, other resources

Content Providers Supply info to Internet Commercial businesses Nonprofit organizations Educational institutions Individuals

Application Service Providers Companies that manage/distribute software-based services Rent software access Examples: office suites, accounting programs Web Services

Infrastructure Companies Enterprises that own/operate paths of the Internet Telephone, satellite, and cable companies

Hardware/software companies Companies that make/distribute products used with internet

Internet Addresses IP address – Internet Protocol address Uniquely identifies each computer or device Example 216. 239. 99 Identifies specific computer

Domain Name IP hard to remember Domain name – text version www. google. com Examples of domain names: Com - commercial Edu - education Gov - government Mil - military Net – network provider Org – non-profit organization

Web Addresses URL – Uniform Resource Locator http: //www. usparks. com/grand_canyon/scenic_vistas. ht ml http: - Hypertext Transfer Protocol – sets rules how pages transfer on the Internet www. us-parks. com – domain name grand_canyon – path to the server scenic_vistas. html – web page name

Looking for info Subject directory – classifies web page by categories www. yahoo. com Search engine – finds web sites, web pages, images, video, news, etc. www. google. com Some do both – Yahoo! And Google

Search Strategies

Using Phrases Use Phrase searching Keying more than one word Returns all phrases first, then the individual words

Boolean Operators And, Or, and Not Example: all searches related to Intel and AMD processor manufactures Example 2: all searches not including Intel Key in “INTEL AND AMD” Key in microprocessors NOT Intel Some search sites use + for AND, - for NOT

Multiple Sites Don’t be afraid to use other search sites Give different results Use more than one

Appropriate Keywords Do not use “the”, “a”, and “in” unless they are part of a phrase Example: want to find out about bed and breakfasts located in Monticello, Georgia Key in – Monticello Georgia bed and breakfast If this doesn’t help – use synonyms Ex. Hotel or lodging

Wildcards A special symbol in conjunction with a part of a word Ex. Hand sign* This would find hand signs, hand signaling, and any other combination