1.7 ENHANCING AND TESTING YOUR UNDERSTANDING
SUMMARY
 When two or more computers are connected together so
they can communicate with one another, they form a
network. The largest computer network in the world in
the Internet.
 The Internet has a number of different services such as
e-mail, Gopher, ftp, telnet, and Usenet news groups,
but by far the most popular is the World Wide Web, or
the Web.
 The Web is a series of interconnected documents stored
on a computer somewhere called a site or web site.
 Individuals who need just temporary access to the web
use dial-up access. This can be gained using a modem
or other device to connect to an access provider.
 To connect to the Internet over the telephone line, you
need a phone connection that uses Serial Line Internet
Protocol (SLIP) or Point-to-Point Protocol (PPP).
 Direct service providers, such as AT&T, give you a
connection to the Internet and storage space on their
computers so you can use e-mail and transfer files.
 When you use your computer and a software program
called a browser to visit a site on the web, your screen
displays a document called a home page.
 Commercial on-line services such as Compu-Serve,
America On-Line, or Microsoft Network can also
connect you to the Internet. In addition, they also give
you access to their own on-line service and e-mail.
 Web pages have highlighted words, buttons, or pictures
that are hypertext links or links containing the address
of another document. When you click a link you jump
to that address.
 URLs (Uniform Resource Locators) are addresses of
pages on the Web. URLs list a protocol (http), a
domain name (www.netscape.com), and/or sometimes
the name of a folder and document (/new/index.html).
 HTTP (Hypertext Transfer Protocol) is the protocol
used by the Web.
 Search engines on the Web let you look up information
using key words that might be in the document you
want to find.
 HTML (Hypertext Markup Language) is the language
used to format Web pages.
 Large companies usually have a person called a
webmaster in charge of their site.
 To use the World Wide Web you need to be connected
to the Internet through a service providera company
with a high-speed direct connection to the Internet.
 Organizations needing a permanent Web presence are
directly connected to the Internet through a service
called a presence provider.
 The index of words in a search engine is compiled by a
software program called a spider, wanderer, or robot
that wanders the web looking for documents.
 Movies, sound and animations are sometimes sent
slowly because the Internet lacks sufficient bandwidth.
 Software called helper applications or
enhances a browser's capabilities.
plug-ins
 The Web offers radio broadcasts, phone service and
multimedia. Television and video are still primitive
because of a lack of sufficient bandwidth.
REVIEW QUESTIONS
1.
2.
3.
4.
5.
6.
T F The largest network in the world is the one
called the Internet.
T F The most popular Internet service is the World
Wide Web.
T F The Internet and the World Wide Web are two
names for exactly the same thing.
T F To make a connection to the Internet over phone
lines, you use what's called dial-up access.
T F
Commercial on-line services such as
CompuServe, America On-Line, or Microsoft
Network don't give you access to the Internet.
T F Once you have clicked to display a new page,
you can't back up to the page you jumped off
from.
CHAPTER 1
7.
T F The term surfing refers to the way you click
links to move from site to site.
8. T F Multimedia is slow over the web because your
connection doesn't have enough bandwidth.
9. T F Streaming refers to playing a movie or sound
file before all of it has been transferred to your
computer.
10. T F You can hold a phone conversation over the
Web.
11. T F A number of television networks are already
broadcasting live shows over the Web.
12. T F To run any multimedia on the Web, the
presentation must be transferred to your system
and played there.
The Internet and the World Wide Web