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Introduction to Internet

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sameera.moparty

The document provides an introduction and history of the Internet. It began as the ARPANET project in 1969 by the US Department of Defense. By 2010, it was estimated that about 80% of the planet would be connected to the Internet. The document also defines common Internet terms and protocols like SMTP, POP, and IMAP for email and defines narrow and broadband connections. It discusses issues like spam, scams, viruses, worms, and Trojan horses that can affect Internet users.

EducationTechnologyNews & Politics
1 of 20
Introduction to Internet Presented by Sameera Kishore
A Brief History of Internet ,[object Object],[object Object]
Internet Growth Trends 1977: 111 hosts on Internet 1981: 213 hosts 1983: 562 hosts 1984: 1,000 hosts 1986: 5,000 hosts 1987: 10,000 hosts 1989: 100,000 hosts 1992: 1,000,000 hosts 2001: 150 – 175 million hosts 2002: over 200 million hosts By 2010, about 80% of the planet will be on the Internet
EMAIL DEFINITIONS ABUSE CONNECTING TO INTERNET INTERNET
NARROW BAND BROAD BAND CONNECTING TO INTERNET ,[object Object],[object Object],[object Object],45% 55% Jan ‘05 32% 68% March ’06 Narrow band Users Broad band Users Year
Simple Mail Transfer Protocol ( SMTP ) : It is the protocol used to send email messages from one server to another. Post Office Protocol ( POP3 ): It stores the messages for the recipient. To retrieve the messages, the user must connect to it using email client or the online email service IMAP: It enables a user to check email from multiple computers at different locations.
You need broadband to: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],5 mins 62.4 mins Upgrade Software ( 25 MB ) 47 seconds 9.9 mins MP3 file ( 4MB ) 11 seconds 2.5 mins Video Clip ( 1 MB) 5 seconds 1.5 mins Digital image (.5 MB) Broadband Dial-up File Download
DEFINITIONS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
WHAT HAPPENS WHEN WE – EMAIL ?!?! An email is a text message sent to a recipient using email clients such as Microsoft outlook, Juno client or online email services such as Yahoo & Gmail.
DOMAIN NAME SYSTEM (or Service or Server) ,[object Object]
domain name ,[object Object],[object Object],What is a Fully Qualified Domain Name ? example: www.maps.google.com Top Level Domain User Specific Domain Sub Domain
File Transfer Protocol (FTP) ,[object Object],Hypertext Transfer Protocol (HTTP) ,[object Object],[object Object],[object Object],Internet Protocol (IP Address ) ,[object Object],[object Object],Uniform Resource Locator ( URL ) ,[object Object],[object Object]
ABUSE SPAM SCAM VIRUS
Is your computer spewing SPAM???? Spam or Spamming is the abuse of electronic messaging systems to indiscriminately send unsolicited messages. Email Spam is the practice of sending unwanted email messages frequently with commercial content, in large quantities to an indiscriminate set of recipients. EMAIL SPAM Unsolicited Bulk Email Unsolicited Commercial Email
Examples of SPAM ,[object Object],[object Object],[object Object],[object Object],Fight against SPAM ,[object Object],[object Object],[object Object],[object Object]
SCAM Scams are emails cleverly disguised as coming from real companies when they are actually trying to know your private information such as passport number, bank account, social security number etc. Again, it is one of the most common problems faced by Internet users . Work-at-home scams Nigerian scams Lottery scams Phisher scams
VIRUS : A computer virus is a small piece of software that attaches itself to a program or a file enabling it to spread from one computer to another ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],E.g. of Virus : Melissa. A, Anti EXE, Trj.Reboot, Word Concept .
WORM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Trojan Horse ,[object Object],[object Object],Well-known Trojan horses: Back Orifice Back Orifice 2000 Netbus Subseven Downloader- EV
THANK YOU! ?

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Introduction to Internet

  • 1. Introduction to Internet Presented by Sameera Kishore
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  • 3. Internet Growth Trends 1977: 111 hosts on Internet 1981: 213 hosts 1983: 562 hosts 1984: 1,000 hosts 1986: 5,000 hosts 1987: 10,000 hosts 1989: 100,000 hosts 1992: 1,000,000 hosts 2001: 150 – 175 million hosts 2002: over 200 million hosts By 2010, about 80% of the planet will be on the Internet
  • 4. EMAIL DEFINITIONS ABUSE CONNECTING TO INTERNET INTERNET
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  • 6. Simple Mail Transfer Protocol ( SMTP ) : It is the protocol used to send email messages from one server to another. Post Office Protocol ( POP3 ): It stores the messages for the recipient. To retrieve the messages, the user must connect to it using email client or the online email service IMAP: It enables a user to check email from multiple computers at different locations.
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  • 9. WHAT HAPPENS WHEN WE – EMAIL ?!?! An email is a text message sent to a recipient using email clients such as Microsoft outlook, Juno client or online email services such as Yahoo & Gmail.
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  • 14. Is your computer spewing SPAM???? Spam or Spamming is the abuse of electronic messaging systems to indiscriminately send unsolicited messages. Email Spam is the practice of sending unwanted email messages frequently with commercial content, in large quantities to an indiscriminate set of recipients. EMAIL SPAM Unsolicited Bulk Email Unsolicited Commercial Email
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  • 16. SCAM Scams are emails cleverly disguised as coming from real companies when they are actually trying to know your private information such as passport number, bank account, social security number etc. Again, it is one of the most common problems faced by Internet users . Work-at-home scams Nigerian scams Lottery scams Phisher scams
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