Chapter 7

Module 7AUnderstanding the Internet Module 7BUsing 7

7 Understanding the Internet l Introducing the Internet l Internet Software l Exploring Internet Services l How the Internet Works l Intranets l The Future of the Internet Module A

7 A Introducing the Internet: The Network of Networks The Internet is the first mass medium that involves computers and uses digitized data. It’s much more interactive than TV, radio, or newspapers. Understanding the Internet Looking for a radio station? Try Live Radio on the Internet, which lists more than 1500 live Internet radio stations worldwide.Live Radio on the Internet

7 Introducing the Internet l A galactic network äInternet address or IP address äInternet service provider (ISP) l Interoperability äcross-platform network A Module Understanding the Internet LANs and computers connected to the Internet are maintained by corporations, ISPs, and universities who sell Internet subscriptions to the public.

7 Introducing the Internet l Leave the lower layers to the LANs & WANs l Internet vs. online services äAOL A Module Understanding the Internet Forty percent of home Internet users access the Internet through America Online (AOL).

7 Introducing the Internet A Module Understanding the Internet

7 Introducing the Internet l The Internet’s history äimportance of communication & socializing äfrom ARPNET to Internet ärise of a new mass medium A Module Understanding the Internet To learn more about Internet history visit the Internet Society’s Internet Histories page.Internet Society’s Internet Histories page.

7 Internet Software l Internet service äclient & Server A Module Understanding the Internet Netscape Navigator and Microsoft Internet Explorer are the two leading browsers.

7 Exploring Internet Services l Electronic mail ( ) : Staying in touch l World Wide Web (WWW) : Accessing information ähypertext ähyperlinks äURL A Module Understanding the Internet Big Bad Voodoo Daddy site is an example of a site that features hypertext

7 Exploring Internet Services l FTP: Transferring files äFTP ädownloading & uploading äanonymous FTP äcompression software l Usenet: Joining online discussions ästandard newsgroups äalt newsgroup äbiz newsgroups A Module Understanding the Internet Learn the rules of netiquette by visiting Emily Postnews, the authoritative voice concerning Usenet manners.Emily Postnews, the authoritative voice concerning Usenet manners.

7 Exploring Internet Services l IRC: Text chatting in real time äInternet Relay Chat (IRC) l Internet telephony: Real time voice & video l More Internet services äInternet paging äMUDs ätelnet äping äArchie, Gopher, Veronica A Module Understanding the Internet To get started with IRC, visit the IRChelp.org Help Archive.IRChelp.org Help Archive

7 How the Internet Works: A Geography of Cyberspace l Configuring your computer for Internet access l Accessing the Internet äshell access ädial-up access with point-to-point protocol (PPP) äcable and satellite access äLAN access A Module Understanding the Internet

7 How the Internet Works: A Geography of Cyberspace l Internet Service Providers (ISPs) l Backbones l Internet protocols (TCP/IP) äInternet protocol (IP) ätransmission control protocol (TCP) A Module Understanding the Internet Looking for an ISP? A good place to start is The List that currently lists nearly 5,000 service providers.The List Explore the Internet’s physical structure at “An Atlas of Cyberspace”“An Atlas of Cyberspace”

7 How the Internet Works: A Geography of Cyberspace l Domain Name System (DNS) ägov äedu ämil äcom änet A Module Understanding the Internet See for yourself how the domain name service operates. Access the NSLOOKUP page and type in a domain name such as Click the Run button, and you’ll see the IP address below.NSLOOKUP page

7 The Internet l Intranets: Using TCP/IP inside the enterprise äextranets l Future of the Internet ämore Internet addresses ämore bandwidth A Module Understanding the Internet

7 Using l Fundamentals l Introducing Clients l Composing, Receiving, & Forwarding l Managing l Mailing Lists l Using Responsibly Module B

7 Fundamentals l servers & clients B Module Using An server runs on your ISP’s computer. When you send mail, the server sends your mail over the Internet. An client runs on your computer and enables you to read and reply to received messages, compose new ones, and forward mail. User ISP Client Server

7 Fundamentals l addresses have 3 parts ämailbox name jsmith äat äserver address jamestown.edu äalias äbounce message l protocols äSMTP äMIME äPOP äIMAP Module B Using

7 Introducing Clients l Getting an account äfree service l Setting up your client Module B Using Among the most popular free services are Angelfire, Hotmail, and Yahoo! Mail.Angelfire HotmailYahoo! Mail

7 Introducing Clients l Exploring your client’s window äfolder list ämessage list ämessage window Module B Using Although programs vary, they all look and work much the same way.

7 Composing, Receiving & Forwarding l Logging on to the mail server l Receiving mail l Replying directly to the author l Replying to all Module B Using A dialog box prompts you for your password before you can access your account

7 Composing, Receiving & Forwarding l Composing l Forwarding Module B Using The composition window

7 Composing, Receiving & Forwarding Module B Using When you receive a file that has an attachment, you’ll see an icon informing you that there’s more to the message than text alone Attachment icon

7 Managing l Organizing your mail l Filtering incoming mail l Dealing with unwanted mail (Spam) Module B Using Custom folders for a college student might include various classes, friends, and family members.

7 Mailing Lists l Subscribing to a mailing list l Participating in a mailing list l Unsubscribing äflames (angry letters) Module B Using To find a mailing list in a subject that interests you, try “Mailing Lists on the Net,” Liszt, and “Publicly Accessible Mailing Lists” “Mailing Lists on the Net,LisztPublicly Accessible Mailing Lists”

7 Using Responsibly l Using at work l Backup tapes l Additional risks Module B Using For an update on the latest and other Internet hoaxes, see the U.S. Department of Energy’s “Internet Hoaxes” pageU.S. Department of Energy’s “Internet Hoaxes” page

7 Using Responsibly l How to stay out of trouble äDo not use company for personal use äNever respond to junk (spam) äNever use to harass or intimidate äWhen using company’s , never say anything you wouldn’t want your boss to see Module B Using