The document provides an introduction to the internet. It describes the internet as a worldwide network of computers connected by wired or wireless connections. It then discusses how the internet was developed from the ARPANET system created by the US Department of Defense. It also explains how the internet works through servers, browsers, and internet service providers. It provides details on topics like IP addresses, wired and wireless internet connections, domain names, and common uses of the internet.

2. Introduction To Internet
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4. What is Internet ?
• The internet is a world-wide network of
computers that linked together by wired or
wireless connection.
• Internet has been coined from two terms,
interconnection and network.
• two categories: servers and browsers.

5. How was Internet developed?
• Internet was born in late 1960’s
• The internet has its root in the ARPANET
system of the Advanced Research Project
Agency of U.S. Department of Defense.
• ARPANET is known as the forefather of
internet.

6. How Does Internet Works?

7. • Servers make this information available to the
general public
• Browsers are what people use to access the
information
• Internet Service Provider (ISP) server

8. Web Server And Server
The Web server
• A Web server handles the HTTP protocol.
When the Web server receives an HTTP
request, it responds with an HTTP response,
such as sending back an HTML page.
The application server
• An application server exposes business logic
to client applications through various
protocols, possibly including HTTP.

9. Different Types of Server
• Proxy Server
It acts as a mediator between a client program
and an external server to filter requests,
improve performance and share connections.
• Telnet Server
It enables the users to log on to a host
computer and execute tasks as if they are
working on a remote computer.

10. • FTP Server
It works on one of the oldest of the Internet
services, the file transfer protocol. It provides
a secure file transfer between computers
while ensuring file security and transfer
control.
• Mail Server
It transfers and stores mails over corporate
networks through LANs, WANs and across the
Internet.

11. • To view a web page from your browser:
1. Type an address (URL) in "Address Bar" or
click on a hyperlink.
2. Browser sends a request to ISP server.
3. ISP server looks for the exact host server
which website in question, then sends a
request to that host server for the page.

12. 4. The host server sends the requested page to
ISP server.
5. ISP sends the page to browser.

13. IP Address
• To facilitate the routing of packets over a
network the TCP/IP protocol suite uses a
logical address known as an IP address
• An Internet Protocol address (IP address) is a
numerical label assigned to each device
Two functions:
• network interface identification
• location addressing.

14.  Internet Protocol Version 4 (IPv4) - 32 bit
binary number.

16. • The Class A address uses only the first octet (8
bits) of the 32-bit number to indicate the
network address.
• The remaining three octets of the 32-bit
number are used for host addresses.
• The Class B address uses two of the four
octets (16 bits) to indicate the network
address
• The remaining two octets specify host
addresses.

17. • This scheme is known as “dotted decimal
notation.”
 Internet Protocol Version 6 (IPv6) - 128 bits.

18. Wired Internet Connections
• Dial-up connections
• High-speed broadband connections
• Cable modems
• ISDN
• DSL

19. • Wireless WAN (WWAN)
• Satellite services
• Wireless LANs (WLAN)
Wireless Internet Connections

20. Domain name
• A domain name is a unique name that
identifies an internet resource such as a
website.
• Domain names are formed by the
rules Domain Name System (DNS). Any name
registered in the DNS is a domain name.

21. Uses of Internet
1. Social Networking
– Provides medium for people to connect and
interact with each other.
– Facebook, Twitter, Myspace, Instagram, Google+

22. 2. Communication
– Chat with your contacts directly within Gmail.
– You can even talk face-to-face with built-in video
chat.

23. 3. Education.
– Distance learning.
– Reference books, online help centres, Study
oriented material are on the internet.
4. Financial Transactions
- Internet Banking
- Payment of Bills

24. 5. Research
– Gathering, analyzing and sharing information
– The Internet is a wealth of information and is one
of the best ways to find information fast and
efficiently.

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