Professional Web Designing For Absolute Beginners

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Presentation transcript:

Professional Web Designing For Absolute Beginners Chapter 01 - Principles of Internet Introduction to Internet Professional Web Designing For Absolute Beginners Kandy Regional Centre | Pasan Mallawaarachchi

Understanding the Internet and Web Sites Pasan Mallawaarachchi

What is INTERNET Is a Global Network It is the largest network in the world that connects hundreds of thousands of individual computers all over the world Pasan Mallawaarachchi

A Network is a, A network is a group of two or more computes connected together. There are many types of computer networks, including: local-area networks (LANs) The computers are geographically close together (that is, in the same building). wide-area networks (WANs) The computers are farther apart and are connected by telephone lines or radio waves. metropolitan-area networks MANs) A data network designed for a town or city. home-area networks (HANs) A network contained within a user's home that connects a person's digital devices.

WAN

Why Computer networks Allows computers to exchange data The connections between devices established using wireless media or cable media Wireless – Radio (WIFI), Microwave, Satellite Cable – telephone, fiber optics, twisted pair, coaxial cable etc

Why Computer networks Computer networks support applications access to the, World Wide Web Servers, printers etc fax machines use of email and instant messaging applications The best-known computer network is the Internet.

Definition of Internet A global network of computer networks that use Standard protocols to Connect & Exchange information, the Largest Network of computer networks. The computers are connected via telephone, Fiber Optic cables, Radio, Microwave or Satellites. Protocols – FTP, HTTP, SMTP

How to connect to internet

INTERNET con. An Information System Communication Tool No one owns it The popular term for the Internet is the “information highway”

Terms Protocols: Just like how we cannot communicate without both knowing the same language, computers cannot communicate without some accepted protocol A protocol is a set of rules to establish connection in computer network TCP/IP HTTP FTP

TCP / IP Transmission Control Protocol / Internet Protocol TCP/IP provides end-to-end connectivity specifying how data should be formatted, addressed, transmitted, routed and received at the destination.

tcp/ip TCP - is used for transmission of data from an application to the network. IP - takes care of the communication with other computers.

TCP / IP Web browsers use TCP when they connect to servers on the World Wide Web TCP/IP is the communication protocol for the internet. TCP/IP defines the rule computers must follow to communicate with each other over the internet.

Connection Eshtablishment

HTTP Hyper Text Transfer Protocol HTTP is the foundation of data communication for the World Wide Web. HTTP is the protocol to exchange or transfer hypertext. HTTP functions as a request-response protocol in the client-server computing model

http request

http HTTP takes care of the communication between a web server and a web browser. HTTP is used for sending requests from a web client (a browser) to a web server, returning web content (web pages) from the server back to the client. Ex http://www.ask.com/question/what-are-the-advantages-of-a-computer-network

FTP File Transfer Protocol Standard network protocol used to transfer files from one host or to another host over network Ex ftp://public.ftp-servers.example.com/mydirectory/myfile.txt

Thank You