wel come Prepared by: BHAVIN TANK MILAN VEGAD What is the WHAT IS THE INTERNET? The Internet is a global network of computer networks. The Internet is a whole network of computer networks sharing information with each other. The Internet Every machine transparently connected to every other Who Uses The Internet ? Institutions of all kinds - academic, government and commercial Institutions of all kinds - academic, government and commercial to gather and share information Professional communities of all kinds - especially research and development organizations Professional communities of all kinds - especially research and development organizations Business enterprises which specialize in providing or collecting information WHO CONTROLS THE INTERNET? The Internet is not controlled by any individual or group. Currently, a non-profit organization or group. Currently, a non-profit organization called the Internet Society (ISOC) elects a board called the Internet Society (ISOC) elects a board that is responsible for managing the technology that is responsible for managing the technology and direction of the Internet. and direction of the Internet. What is a protocol? Protocol is nothing but set of rules for transmission of data from source to transmission of data from source todestination. What is a protocol? a human protocol and a computer network protocol: Hi What is the time? 2:00 TCP connection req. TCP connection reply. Gettime WHAT CAN I DO ON THE INTERNET? COMMUNICATE WITH OTHERS COMMUNICATE WITH OTHERS Electronic Mail ( )Electronic Mail ( ) Usingyou can exchange messages with other people around the world. Usingyou can exchange messages with other people around the world. Usenet NewsgroupsUsenet Newsgroups Usenet is an informal network of computers that allows you to post and read messages in newsgroups that focus on specific topics. Usenet is an informal network of computers that allows you to post and read messages in newsgroups that focus on specific topics. WORLD WIDE WEB (WWW) WORLD WIDE WEB (WWW) -The World Wide Web allows you to access information on any computer, world-wide, that makes files publicly available using hypertext transfer protocol (HTTP). - This protocol allows hypertext links between files on the same computer, or on other computers on the Internet. WHAT CAN I DO ON THE INTERNET? HOW DOES THE INTERNET WORK? Computers that are connected to the Internet communicate with each other using a protocol or special language called TCP/IP (Transmission Control Protocol/Internet Protocol). TCP/IP defines how information moves among computers on the Internet. TCP/IP defines how information moves among computers on the Internet. INTERNET ADDRESSES Every computer that is directly connected to the Every computer that is directly connected to the Internet has a unique Internet address. Internet has a unique Internet address. Computers use IP addresses (e.g., ) to Computers use IP addresses (e.g., ) to identify and communicate with each other. identify and communicate with each other. IP ADDRESSES These addresses contain four separate numbers that represent the general to specific location of a computer as you read them from left to right. These addresses contain four separate numbers that represent the general to specific location of a computer as you read them from left to right. e.g., e.g., You may sometimes see IP addresses but will rarely need to use them. You may sometimes see IP addresses but will rarely need to use them. Internet Standard Domain Names .com commercial organizations .edu educational organizations .gov government institutions .mil military groups .net major network support centers .org organizations other than the above .int international organizations .country code two character identifier for a country in the geographical scheme A web browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web. Web browser is one of the mediator between person and internet information. Web browser