NETWORK AND INTERNET

TOPIC 4: NETWORK AND
INTERNET

Topic outcomes:
❑ To understand network transmission media
❑ To understand Internet services for

communication
❑ To understand and apply netiquette
❑ To understand what is ecommerce and

types of ecommerce

NETWORK

 A network is a collection
of computers and
devices connected
together via
communications devices
and transmission media

2

NETWORKS Facilitating
communications
 Advantages of a network include:
Sharing
hardware

Sharing data and
information

Sharing software

Pages 470 - 471 Discovering Computers 2012: Chapter 9 Transferring 3
funds

NETWORKS

 A local area network
(LAN) is a network that
connects computers and
devices in a limited
geographical area

 A wireless LAN (WLAN) is
a LAN that uses no
physical wires

 A wide area network
(WAN) is a network that
covers a large
geographical area

4

PHYSICAL TRANSMISSION MEDIA FOR
NETWORK

Twisted-pair cable Coaxial cable Fiber-optic cable

Twisted pair Coaxial cable Fiber optic
(UTP) cable cable

5

WIRELESS TRANSMISSION MEDIA
FOR NETWORK

 Cellular radio is a form of broadcast radio that is used widely for mobile
communications

6

WFWOIiRRreENlLeEEssTSTWSraTOnRRsAmKNisSsMioInSSMIOedNiaMfoErDNIAetwork

 Microwaves are radio waves that provide a high-speed signal
transmission

7

WIRELESS TRANSMISSION MEDIA
FOR NETWORK

 Bluetooth defines how two Bluetooth devices use short-range radio
waves to transmit data

 IrDA transmits data wirelessly via infrared (IR) light waves
 RFID uses radio signals to communicate with a tag placed in or attached

to an object, animal, or person

INTERNET

 The Internet is a worldwide collection of networks that
connects millions of businesses, government agencies,
educational institutions, and individuals

9

EVOLUTION OF THE INTERNET

 Each organization is responsible only for maintaining its own network

Information presented on the Web
must be evaluated for accuracy as

no one oversees the content of
Web pages

10

INTERNET

 People use the Internet for a variety of reasons:

Communicate Research and Shop Bank and Invest Online Trading
Access Information

Entertainment Download Videos Share Information Web Application

11

THE WORLD WIDE WEB

 A Web site is a collection of related Web pages and
associated items

 A Web server is a computer that delivers requested Web
pages to your computer

 Web 2.0 refers to Web sites that provide a means for
users to interact

12

THE WORLD WIDE WEB

 A Web browser, or browser, allows users to access Web pages and Web
2.0 programs

Internet Firefox Opera
Explorer

Safari Google
Chrome

13

THE WORLD WIDE WEB

 A home page is the first • Some Web pages are
page that a Web site designed specifically for
displays microbrowsers

 Web pages provide links to
other related Web pages

 Surfing the Web

 Downloading is the process
of receiving information

14

THE WORLD WIDE WEB

 A Web page has a unique address called a URL or Web address

15

THE WORLD WIDE WEB

 A search engine is helpful in locating items such as:

Images Videos Audio Publications

Maps People or Blogs
Businesses

16

OTHER INTERNET SERVICES

 E-mail is the
transmission of
messages and files via a
computer network

 An e-mail program
allows you to create,
send, receive, forward,
store, print, and delete
e-mail messages

17

OTHER INTERNET SERVICES

 A mailing list is a group of e-mail names and addresses
given a single name

 Subscribing adds your e-mail name and address
 Unsubscribing removes your name

18

OTHER INTERNET SERVICES

 Instant messaging (IM) is a real-time Internet communications service

19

OTHER INTERNET SERVICES

 A chat is a real-time
typed conversation that
takes place on a
computer

 A chat room is a location
on an Internet server
that permits users to
chat with each other

20

OTHER INTERNET SERVICES

 VoIP (Voice over IP)
enables users to speak to
other users over the
Internet

 Also called Internet
telephony

21

OTHER INTERNET SERVICES

 FTP (File Transfer Protocol) is an Internet standard that permits file
uploading and downloading with other computers on the Internet

 Many operating systems include FTP capabilities
 An FTP server is a computer that allows users to upload and/or download

files using FTP

22

NETIQUETTE

Netiquette is the code of
acceptable Internet
behavior

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E-COMMERCE

 E-commerce is a Business-
business to-
transaction that
occurs over an consumer
electronic network (B2C)

 M-commerce E-commerce
identifies e-
commerce that Business- Consumer-
takes place using to-business to-
mobile devices
(B2B) consumer
(C2C)

25

END OF TOPIC 4

Do you now able to:

❑ Understand network transmission media
❑ Understand Internet services for
communication
❑ Understand and apply netiquette
❑ Understand what is ecommerce and types
of ecommerce