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Purpose of Web page and Web site Communicate Educate Entertain or Conduct business
The Internet The most popular and
fastest growing area. What is the use of
Internet?
Using the Internet: Do research Get a loan Shop for services Merchandise Job hunt Buy and sell stocks Watch movies and etc. Shop for services
The Internet Is a worldwide collection of networks, each
is composed of a collection of smaller networks.
Network Is composed of several computers
connected together share resources and data.
ISP – Internet Service Provider, is a business that has permanent Internet connections and provides temporary connections to individuals and companies free or for a fee.
Data Travels via InternetStep1: A personal Computer’s request for
information travels to the ISP.
Step2: When the request leaves the ISP, it travels over medium speed data lines, microwave stations, and communications satellites until it reaches the internet backbone.
Data Travels via Internet Internet backbone – a high-speed data lines
that connect major computer systems located around the world.
Step 3: The request travels over high-speed data lines along the Internet backbone.
Data Travels via InternetStep 4: The request travels over medium-
speed data lines until it reaches the destination network server.
World Wide Web The collection of links throughout the
Internet creates an interconnected network. Which also referred to as the Web or
WWW. Web site – Web containing information that
can be referenced with a link. It is a collection of linked Web pages, typically starts with a home page.
World Wide Web Web page – Graphics, text, and other
information available at a Web site are stored in a specifically formatted electronic document.
Home page – provides information about the Web site’s purpose and content.
Splash page – is a lead-in page often containing multimedia.
World Wide Web Multimedia – is some combination of text,
graphics, animation, audio or video.
Accessing Information on the Web Connecting to the Web is through Public
Switch Telephone Network (PSTN) A worldwide telephone system that handles
voice-oriented telephone calls. Dial-Up Lines
Is a temporary connection that uses one or more analog telephone lines for communication.
Accessing Information on the Web Dedicated Lines
Is a connection that always is established between two communications devices
Transfer rate – is the speed at which a line carries data and information. It expresses as bit per second (bps). It ranging from thousands of bits per second called kilobits per second (Kbps), Millions of bits per second called Megabits per seconds (Mbps), billions of bits per second called (Gbps).
ISDN Lines Integrated Services Digital Network Provides faster transfer rates than dial-up
telephone lines. A set of standards for digital transmission
of data over standard copper telephone lines.
Speeds of Various Connections to the Internet
$10,000 or more44 MbpsT3
$1,000 or more1.544 MbpsT1
$30 to $70128 Kbps – 2.5 Mbps
Cable TV (CATV)
$38 to $110128 Kbps – 8.45 Mbps
ADSL
$10 to $40Up to 128 KbpsISDN
Local or long-distance rates
Up to 56 KbpsDial-up
Approximate Mo. Cost
Transfer RatesTypes of Line
Four Types of Dedicated Line DSL – Digital Subscriber Line
another digital alternative for the small business or home user.
Installation can provide a dial tone, so you can use the line for both voice and data. ADSL – Asymmetric Digital Subscriber Line
Type of DSL that supports faster transfer rates when receiving data than when sending data.
Four Types of Dedicated Lines ISDN – Integrated Services Digital
Network Use for small business and home user. Faster than transfer rates than dial-up. Set of standard for digital transmission of
data over standard copper telephone lines.
Four Types of Dedicated Lines Cable Television Lines
CATV lines a popular type of dedicated line that allows the home user to connect to the Internet.
T-carrier Lines Type of digital lines that carry multiple signals over a
single communication line. Provides extremely fast data transfer rates. Only medium to large companies usually can afford
the investment in T-carrier line.
Service Providers An Internet Service Provider (ISP) – is a
business that has a permanent Internet connection and provides temporary connections to individuals and companies free or for fee. POP (Point of Presence) – To use a telephone
line to access the Internet, the telephone number you dial connects you to an access point on the Internet.
What do you considered when selecting a service provider? Be sure it provides at least one local POP
telephone number otherwise you will pay a long distance telephone charges.
Types of ISP A Regional ISP
Provides access to the Internet through one or more telephone numbers local to a specific geographic area.
A National ISP Is a larger business that provides local
telephone numbers in most major cities and town s nationwide.
WEB BROWSER To view Web pages on a computer
monitor. Called browser, a specific software
program that allows for the display of Web pages.
Example: Netscape, IE, Mozilla Firefox
WEB BROWSER One way to access a Web page is to enter
its unique address, called Uniform Resource Locator (URL) in the browser’s address bar or location field.
URL – begins with the protocol, Hypertext Transfer Protocol (HTTP).
HTTP – is the communications standard to transmit data on the Web.
WEB BROWSER Domain Name – which is the text version
of a numeric address for each computer on the Internet, follows the protocol.
http://www.yahoo.com http://205.216.71.230
protocol Domain name
protocol IP address
The Numeric address commonly referred to as an IP address
Common Domain Name and Country Abbreviations
?org
?net
?mil
?gov
?edu
?com
OrganizationOriginal Top-Level Domain Abbreviations
Common Domain Name and Country Abbreviations
?uk
?se
?fr
?ca
?au
CountryCountry Abbreviations
Alternative Web Page Viewing Devices You can view Web Page using the
following: Desktop computer monitor Notebook computer Handheld computer (PDA) Web TV (for a television set)
Search Engine Software programs that find Web sites and
Web pages. How do you locate Web page on particular
topics in the search engine’s text box ?keyword
Portal Are Web sites that offer not only search
services but also e-mail, chat rooms, news and sports, and maps.
Examples:
Excite
Yahoo
Alta Vista
IMPACT OF THE INTERNET AND THE WEB
Communication Education Entertainment Business
TYPES OF WEB SITES Personal
Allows you to advertise your employment credentials, meet new friends, or share a common interest or hobby with fellow enthusiasts.
Organization / Topical Create an organization Web site to promote
member accomplishments or to encourage support and participation.
TYPES OF WEB SITES Commercial
The goal is to promote and sell a product(s) or service(s).
A larger organization or corporation frequently creates an intranet. (PN)