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Basic description about internet
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Introduction To Internet
Jijo [email protected]/jijopalamoodanTwitter Profilehttp://in.linkedin.com/pub/jijo-joseph/41/5b0/364/
Disclaimer: This presentation is prepared by trainees of baabtra.com as a part of mentoring program. This is not official document of baabtra.com – Mentoring Partner
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.
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.
How Does Internet Works?
• Servers make this information available to the general public
• Browsers are what people use to access the information
• Internet Service Provider (ISP) server
Web Server And ServerThe 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.
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.
• 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.
• 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.
4. The host server sends the requested page to ISP server.
5. ISP sends the page to browser.
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.
Internet Protocol Version 4 (IPv4) - 32 bit binary number.
• 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.
• This scheme is known as “dotted decimal notation.”
Internet Protocol Version 6 (IPv6) - 128 bits.
Wired Internet Connections
• Dial-up connections• High-speed broadband connections• Cable modems• ISDN• DSL
• Wireless WAN (WWAN)• Satellite services• Wireless LANs (WLAN)
Wireless Internet Connections
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.
Uses of Internet
1. Social Networking– Provides medium for people to connect
and interact with each other.
– Facebook, Twitter, Myspace, Instagram, Google+
2. Communication
– Chat with your contacts directly within Gmail.
– You can even talk face-to-face with built-in video chat.
3. Education.– Distance learning.– Reference books, online help centres,
Study oriented material are on the internet.
4. Financial Transactions
- Internet Banking - Payment of Bills
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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