Computer
WWW
M-Commerce
conduct commerse using a mobile device
L-Commerce
provide location information
E-Commerce
buying and selling productor service
web publishing
development and maintenance of web pages
plug-in
program that extends the capability of a web browser
Multimedia
2 types search tools
subject directory
classifies web pages in aan organized set of categories
search engine
find information related to a specific topic
Tabbed browsing
Allow to open and view multiple web pages
Has unique address called URL or Web address
Downloading
process of receiving information
Link
related web pages - surfing the web
Home page
Web Browser
Google Chrome
Safari
Opera
Firefox
Internet Explorer
Different between
web 3.0
semantic web, personalization e.g iGoogle, intelligent search
web 2.0
read write web lthrough blogs or sites like Flicker, Youtube
web 1.0
read only content and static HTML
Consists of a worldwide collection of electronic ducuments (web pages)
Web 2.0
refers web sites for users to interact
Web sever
delivers requested web pages
Web site
collection related web pages and associated items
Network and Communication
Categories in Network
Metropolitan Area Network MAN
- Is a network with a size between a LAN nad a WAN. It normally covers the area inside a town and city
Wide Area Network WAN
- Provides long-distrance transmission of data, images, audio and video information owner large geographic areas that may comprise a country, a continent or even the whole world
Local Area Network LAN
- Is usually privately owned and link the device in a single affice, building or campus
Types of Topology
Mesh Topology
- Every device has a dedicated point-to-point link to every other device
Ring Topology
- Each device has dedicated point connection with only the two device on either side of it
Star Topology
- Each device has a dedicated point-to-point link only to a central control, called a hub
Bus Topology
- On the other hand is multipoint
Topology
Is geometic represent of relationship of all the links and finding devices usually called nodes to one another
Component of a Computer Network
Software component
Protocol suite – Open System Interconnection OSI model, TCP/IP model
Networking operating
Hardware component
Connecting devices – router, bridges, hubs, repeater, gateways and swicthes
Transmission media
Peers
Clients
Servers
Component of Data Communication
Protocols – The set of rules thatgoverns data communication, represent an agreement
Transmision medium - The physical path by which a message travels from vender to receiver like radio waves
Receiver – The device that receives the message like television
Sender - The device that sends the data message, it can be a computer, video camera, workstation telephone
Message – The data to be communicated, the popular form of information include text number, pictures, audio
The Internet
Other Internet Services
FTP File Transfer Protocol
messange board
newgroup
VoIP Voice over IP
chat room
chat
Instant messaging IM
E-mail program
E-mail
Netiquette
Golden Rule
treat other as you would like them to treat you
the code of acceptable internet behavior
Evolution of the Internet
DNS server
Domain name
the text version of an IP address
IP address
number that uniquely identifies
Acces provider is that individuals and organizations
acces to the internet free or for a fee
Wireless Internet WISP
Online OSP
Internet ISP
Home and small business
fixed wireless and others
Fiber to the Premises FTTP
Cable Internet service
A worldwide collection of network that link to
Who manage the Internet - NOBODY
Each organization is responsible own network
