your computer is connected to the Internet and has a unique address. How does it 'talk' to other computers connected to the Internet? An example should serve here: Let's say your IP address is 220.127.116.11 and you want to send a message to the computer 18.104.22.168. The message you want to send is &quot;Hello computer 22.214.171.124!&quot;. Obviously, the message must be transmitted over whatever kind of wire connects your computer to the Internet. Let's say you've dialed into your ISP from home and the message must be transmitted over the phone line. Therefore the message must be translated from alphabetic text into electronic signals, transmitted over the Internet, then translated back into alphabetic text. How is this accomplished? Through the use of a protocol stack . Application Protocols Layer Protocols specific to applications such as WWW, e-mail, FTP, etc Transmission Control Protocol Layer TCP directs packets to a specific application on a computer using a port number .Internet Protocol Layer IP directs packets to a specific computer using an IP address.Hardware LayerConverts binary packet data to network signals and back. (E.g. ethernet network card, modem for phone lines, etc.)
The ISP maintains a pool of modems for their dial-in customers. This is managed by some form of computer (usually a dedicated one) which controls data flow from the modem pool to a backbone or dedicated line router. This setup may be referred to as a port server, as it 'serves' access to the network
A web browser is an interface between you and the internet.Most browsers have a graphical user interface(GUI).they allow customers a means to connect to a location on the internet either by typing in the desired address or by clicking on hyperlinks to reach a site. There are many kinds of browsers available, Netscape Navigator, Internet Explorer.
CONTENTS Introduction Origins &Early Development. Working of ISP. Protocol stacks & packets Where to begin Internet Addresses Getting Connected to INTERNET Networking Infrastructure What is Domain Name? What is Internet Explorer? Why do we use Internet? Surfing The Net Advantages of using the internet Internet access gap in Education
Origins &Early Development Cold War origins- Advanced Research ProjectAgency(ARPA). ARPANET-share computer power &ideas. (1969-70s). 1980s:Internet growth- Rise of PCs;Rise of e- mail(1989:159K users, Exponential demand &growth in Internet use.
TerminalTerminal PC INTERNETTerminal Unix System Dial-Up Dial-upPC Branch Office NET ISDN Connection ISPE sedT lea PC Line HubH PC SwitchE TerminalR server RN PrinterE Web Server Router Mobile UsersT Corporate LAN
Where to begin Internet Addresses Because the Internet is the global network of computers. Each computer connected to the Internet must have a unique address(IP address) INTERNETYour computer126.96.36.199 Another computer 188.8.131.52
Getting Connected to INTERNET We need a PC with Modem ,a Telephone Connection from an INTERNET SERVICE PROVIDER(ISP). It is an organization which provides Internet Connectivity For a charge MTNL Satyam Online VSNL DISHNET
Domain Name Inverse Domain Name Genric Domain Country Domain Name ARPA1. .com 1. AU Root Level In-addr2. .edu 2. CA 5.33. .mil 3. DE 1 21.4 132 2 4.134. .gov 4. US 345. .org 5. IN 416. .net 6. JP In.addr.arpa 121
What is Internet Explorer? Internet Explorer is a Web browser from Microsoft that enables you to –2. Access the Wealth of Information&Network applications on corporate Internet.3. You can easily access information from variety of sources, from the latest websites to legacy corporate database.
Why do we use internet Sharing information on any topic E-mail and chatting. ENTERTAINMENT-for listening Music, Jokes etc… Education-For remote learning. In buisness-Eg Advertising & Selling
Surfing the Net or Internet simply means viewing multiple Web sites either by typing in a URL or clicking on hyperlinks.Downloading-means to transfer a file to your computer from elsewhere. Uploading-means to transfer a file from your computer.
Advantages Of Using TheInternet Global Audience Relatively Inexpensive Operates 24hours,aday& a week. Provide Technical Support Create Online Discussion Forums