The document presents a comprehensive overview of how the internet functions, detailing its structural components including backbones, protocols like TCP/IP, and addressing schemes like IP addresses and domain names. It describes the various uses of the internet for communication, multimedia access, and information sharing, along with major features such as the World Wide Web and email. Additionally, it highlights the essential infrastructure that enables data exchange and connectivity across a global network.

1. Internet
HOW DOES IT WORK
Presentation By
SIYONA KAUL
X C

2. INDEX
• The Internet
• Internet and its Use
• How the Internet Works
• Major Features of the Internet

3. The Internet
• The Internet is a worldwide collection of computer networks, cooperating with
each other to exchange data using a common software standard.
• The Internet uses high-speed data lines, called backbones, to carry data.
Smaller networks connect to the backbone, enabling any user on any network
to exchange data with any other user.
• The Internet was created by the Advanced Research Projects Agency (ARPA)
and the U.S. Department of Defense for scientific and military
communications.

5. The Internet and its use
• Internet allows the users to
• Connect easily through personal computers, mobile phones and smart TV
• Exchange electronic email with all those who have accounts on the
internet
• Posts information for others to access and updates it frequently
• Access multimedia information that includes text, photo, music, video etc
• Access diverse perspectives from around the world

6. How the Internet Works
• TCP/IP
• Every computer and network on the Internet uses the same protocols
(rules and procedures) to control timing and data format.
• The protocol used by the Internet is the Transmission Control
Protocol/Internet Protocol, or TCP/IP.
• No matter what type of computer system you connect to the Internet, if
it uses TCP/IP, it can exchange data with any other type of computer.

7. How the Internet Works
• Routing Traffic Across the Internet
• Most computers don't connect directly to the Internet. Instead, they connect to
a smaller network that is connected to the Internet backbone.
• The Internet includes thousands of host computers (servers),which provide
data and services as requested by client systems.
• When you use the Internet, your PC requests data from a host system. The
request and data are broken into packets and travel across multiple networks
before being reassembled at their destination.

9. How the Internet Works
• Addressing Schemes
• In order to communicate across the Internet, a computer must have a
unique address.
• Every computer on the Internet has a unique numeric identifier, called an
Internet Protocol (IP) address.
• Each IP address has four parts
• Internet addresses are in the form nnn.nnn.nnn.nnn where nnn is a
number from 0 - 255. This address is known as an IP address. (IP stands
for Internet Protocol; more on this later.)
• With each part a number between 0 and 255, an IP address might look
like this: 205.46.117.104.

10. How the Internet Works
• Addressing Schemes
If you connect to the Internet through an Internet Service Provider (ISP), you are
usually assigned a temporary IP address for the duration of your dial-in session. If
you connect to the Internet from a local area network (LAN) your computer might
have a permanent IP address or it might obtain a temporary one from a DHCP
(Dynamic Host Configuration Protocol) server. In any case, if you are connected to
the Internet, your computer has a unique IP address.

11. How the Internet Works
• Domains and Sub Domains
• In addition to an IP address, most Internet hosts or servers have a
Domain Name System (DNS) address, which uses words.
• A domain name identifies the type of institution that owns the
computer. An Internet server owned
by IBM might have the domain name
ibm.com.
• Some enterprises have multiple
servers, and identify them with
subdomains, such as
products.ibm.com.

12. Major Features of Internet
• The World Wide Web
• The World Wide Web supports hypertext documents, allows users to view
and navigate different types of data.
• A Web page is a document encoded with hypertext markup language (HTML)
tags. HTML allows designers to link content together via hyperlinks. Every
Web page has an address, a Uniform Resource Locator (URL).
• E-Mail
• An account on the Internet mail server with a domain name and an email
program helps create, send, and receive e-mail messages
• To use e-mail, a user must have an e-mail address, which you create by adding
your user name to the e-mail server's domain name, as in jsmith@aol.com.

13. Major Features of Internet
• News
• Telnet
• File Transfer Protocol (FTP)
• Internet Relay Chat (IRC)

14. Acknowledgement
• https://web.stanford.edu/class/msande91si/www-
spr04/readings/week1/InternetWhitepaper.htm
• https://simple.m.wikipedia.org › wiki › Internet
• https://www.edn.com › electronics-news › Top-10-uses-
of-the-Internet