CHAPTER 2: THE INTERNET, THE WEB & ELECTRONIC COMMERCE
Computer Foundation I (COMP001) – FALL 2009
Topics
Topics
Page(s)The Internet and The Web
27‐29Access
30
Access
30
Communication – QU Webmail
32
Electronic Commerce
41
Search Tools
38
Web Utilities
45
The Internet and The Web
Search assists in locating Web resources E Commerce E‐Commerce involves the buying and selling of goods over the Internet Web Utilitiesare programs that make using the Web easier
Internet versus Web
Internet
1.
Launched in 1969 with ARPANET.
2.
The Internet consists of the actual physical network made up of
p y
p
wires, cables, and satellites.
3.
Being connected to this network is often described as being
online.
Web
1
Introduced in 1992 at CERN.
1.
Introduced in 1992 at CERN.
Most Common Uses
1. Communicating
is by far the most popular Internet activity. You can ex‐changee‐mail with your family and friends almost anywhere in the world. You can join and listen to discussions and debates on a wide variety of special‐interest topics.
2. Shopping
is one of the fastest‐growing Internet applications You can win‐dow2. Shopping
is one of the fastest growing Internet applications. You can win dowshop, look for the latest fashions, search for bargains, and make pur‐chases.
3. Searching
for information has never been more convenient. You can ac‐cesssome of the world’s largest libraries directly from your home com‐puter. You can find the latest local, national, and international news.
4. Education
ore‐learning
is another rapidly emerging Web application. You cantake classes on almost any subject. There are courses just for fun and there are courses for high school college and graduate school credit Some cost nothing courses for high school, college, and graduate school credit. Some cost nothing to take and others cost a lot.
How to ACCESS
to the Internet?
PROVIDERS 1. The most common way to access the Internet is through an Internet service provider (ISP). 2. The providers are already connected to the Internet and pro‐vide a path or connection for individuals to access the Internet. 3. The most widely used commercial Internet service providers are national and wireless providers wireless providers. Internet service providers •Example in Qatar‐ Qtel h d h h d d l h bl •They provide access through standard telephone or cable con‐nections. •Users can access the Internet from almost anywhere within the country for a standard fee.•Use variety of connection technologies: dial‐up, DSL, cable, and wireless modemsy g p, , , Wireless service providers
Do not use telephone or cable lines. They provide Internet connections for
t ith i l d d id f i l d i
How to ACCESS
to the Internet?
BROWSERS
1. Programs that provide access to Web resources.
2. This software connects you to remote computers, opens and transfers files, displays text and images and provides in one tool an uncomplicated interface displays text and images, and provides in one tool an uncomplicated interface to the Internet.
3. Three well‐known browsers are Mozilla Firefox, Netscape Communications, and Microsoft In‐ternet Explorer.
4. For browsers to connect to resources, the location or address of the resources must be specified, known as uniform resource locators (URLs).
5. URLS have two basic parts:
• Protocols used to connect to the resources – e.g.: http://Protocols used to connect to the resources e.g.: http:// (protocols are rules for exchanging data between computers) • Domain name ‐ the name of the server where the resource is located 6. The last part of the domain name following the dot (.) is the top‐level domain (TLD) It id tifi th t f i ti F l i di t (TLD). It identifies the type of organization. For example, .com indicates a commercial site.
//
Domain name Protocolhttp://www.mtv.com
TLD1. Once the browser has connected to the Web site, a document file is sent
back to your computer. This document typically contains Hypertext
Markup Language (HTML) commands The browser interprets the HTML
Markup Language (HTML) commands. The browser interprets the HTML
commands and displays the doc‐ument as a Web page.
2. Web pages also can contain special pro‐grams called applets that are
typically written in a programming language such as Java.
typically written in a programming language such as Java.
Some terms:
•Browsers access the Web allowing you to surf or explore.
•URLs locations or addresses to Web re so rces t o parts are protocol and
•URLs—locations or addresses to Web re‐sources; two parts are protocol and domain name; top‐level domain (TLD) identifies type of organization.
•HTML—commands to display Web pages; hyperlinks (links) are connections.
E‐Mail (Electronic Mail)
1. E‐mail (electronic mail) is the transmission of electronic
messages.
2. Now e‐mail routinely includes graphics, photos, and many
different types of file at‐tachments.
3. People all over the world send e‐mail to each other.
4. All you need to send and receive e‐mail is an e‐mail account,
y
,
access to the Internet, and an e‐mail pro‐gram.
5. Basic elements: header (including addresses, subject, and
attachments), message, and signature line.
attac
e ts),
essage, a d s g atu e
e
Two parts of email address Two parts of email address
How does E‐mail works?
E‐mail is sent and received
through electronic "post
ffi
" k
il
offices" known as mail servers.
To read your e‐mail, you must
retrieve it from the mail
retrieve it from the mail
server.
Once you enter the address of
Once you enter the address of
the recipient, compose your
message, and click Send, your
e‐mail software handles the
e mail software handles the
delivery.
Basic Elements of an Emails message
Addresses: Addresses of the persons sending,
receiving, and, optionally, any‐one else who is receiving, and, optionally, any one else who is to receive copies Attachments: Many e‐mail pro‐grams allow y p g you to attach files such as documents and work‐sheets. If a message has an at‐tachment, the file name appears on the attachment line Subject: A one‐line description, used to present the topic of the message. The letter or message comes next. It is i ll h d h i i ll h typically short and to the point. Finally, the signature line provides additional information about the sender.
QU Webmail
Size of the emails Available or used storage Senders name or email address Subject of the emails Date & Time emails are sent emails Folders nameQU Webmail – Received Mail
Subject of the j message Sender email address Date & Time email sent Recipients of this message email address Name of files attached with the messageQU Webmail – Composing message
To send email To include file(s) with emails To save the message before sending. T ll h k th before sending. To spell check the messageRecipients email addressees)
C.c.‐Email address of people you want to send a copy of the same messageBcc (Blind Carbon Copy): Other Bcc (Blind Carbon Copy): Other recipients can’t see the email address here. Text Area Subject of your message
Other terms
Spam is unwanted and unsolicited e‐mail that may include a
computer virus.
Spam blockers are programs that identify and eliminate
Spam blockers are programs that identify and eliminate
spam.
Spam Blocker Site
InBoxer www.inboxer.com
OnlyMyEmailPersonal www.onlymymail.com
Qurb www.qurb.com
Vanquish vqME www.vanquish.com
Instant Messaging
1.
An extension of e-mail that allows two or more people to contact
each other via direct, live communication.
2
T
i
t
t
i
if
li t
f f i
d
d
2.
To use instant messaging, you specify a list of friends and
register with an instant messaging server.
3.
To see how instant messaging works, check on the following site at
www.computing2008.com
and enter the keyword im
4.
Universal Instant Messengers provides instant messaging that
support communication with other services
support communication with other services.
Social Networking
1. One of the fastest‐growing uses of the Internet . 2. Use to connect individuals to one another.
3 There are three basic categories of social networking sites: reuniting friend‐of‐ 3. There are three basic categories of social networking sites: reuniting, friend‐of‐
a‐friend, and common interest.
• Reuniting sites are designed to connect people who have known one
another but have lost touch Two of the best know reuniting sites are another but have lost touch. Two of the best‐know reuniting sites are Classmates Online and Facebook.
• Friend‐of‐a‐friend sites are designed to bring together two people who do
not know one another but share a common friend not know one another but share a common friend. • Common interest sites bring to‐gether individuals that share com‐mon interests or hobbies. Some examples: Flickr, Linkedln, and Meetup. Before providing any information to a social networking site or to any individual, consider carefully what you are disclosing. Do not provide inappropriate or overly personal information. Check on page 38, there are some others social networking sites.
Search Tools
•
Search services operate Web sites that can help
you locate the information you need
you locate the information you need.
•
They maintain huge databases relating to
information provided on the Web and the Internet.
p
•
Special programs called spiders is used to
continually look for new information and update
h
h
’
b
the search services’ databases.
•
Search services include Search Engines,
Metasearch Engines and Specialized Search
Metasearch Engines, and Specialized Search
Engines.
Search Engines
• Search engines are specialized programs that assist you in locating information
on the Web and the Internet.
• Some examples are: Yahoo, Goggles, MSN and many more. • Most search engines provides two different search approaches:
• Keyword search: In a keyword
search, you enter a keyword or Keyword search
Directory search
phrase reflecting the information
you want. The search engine compares your entry against its database and returns a list of hits, database and returns a list of hits,
or sites that contain the keywords.
• Directory search: Most search
i l id di t
engines also provide a directory or list of categories or topics such as
Autos, Finance, and Games. In a
directoryy search, you selecty a category or topic that fits the information that you want.
