2. Internet Publishing and Network Topology

3. The Internet yahoo.com to the rest of the Internet http://www.starsearch.com/celebs/3dbang.htm 3dbang.htm “web root” www.starsearch.com youngschool.youngtown.org

4. Internet and Intranets The Internet - Everything everywhere Intranet - A private group of computers –Also known as a “local area network” (LAN) –Connected to the main Internet by one or more “gateway” computers –Examples: The computers belonging to a single town & district (youngtown.org, uconn.edu) Computers of a single business (hitech.com, yahoo.com, generalelectric.com, etc.) Computers belonging to part of the government (whitehouse.gov), to Internet intranet gateway other computers in the intranet

5. hs.youngtown.org www.youngtown.org (i.e., town public web site) youngschool.youngtown.org k6.youngtown.org The youngtown.org Intranet uconn.edu Dark gray clusters comprise the totality of the Young Town intranet.

6. Intranet - A restricted part of the Internet classrooms gateway computer - Bottlenecks all network activity between the Internet and local network - Can filter illicit access - Protects against outside hacking (“firewall”) - Allows legitimate in-bound access (“proxy server”) to/from the Internet intranet computer lab youngschool.youngtown.org only local users can access other computers on the intranet

7. Local Server(s) local server machine - Can provide specialized local services * Local web server * Network file server * FTP server (file transfer protocol) -May or may not exist on any given intranet youngschool.youngtown.org to/from the Internet intranet computer lab classrooms

8. A Local Web Server www.youngschool.youngtown.org to/from the Internet “web root” http://www.youngschool.youngtown.org/students/portfolios/jsmith/ - Can be set up to be only locally accessible, depending on local preferences

9. File Servers and File Sharing uconn.edu - Hard disk on a remote machine is treated as if it were actually attached directly to the local computer. - Allows uploading and downloading files to servers. - On PC’s browse My Network Places, Network Neighborhood, or Find Computer - On Mac’s use Chooser and AppleShare (Mac OS 9) or “Connect to Computer” menu command (Mac OS X)

10. hs.youngtown.org www.youngtown.org (i.e., town public web site) www.youngschool.youngtown.org (private - inside firewall only) k6.youngtown.org Publishing to the Intranet versus Internet W X uconn.edu