INTERNET Maarja Kask

1
INTERNETMaarja Kask

• ACTION PROGRAMME OF THE EUROPEAN UNION
• LEONARDO DA VINCI
• PROJEKT NO. 2002 LA 112 628 BILVOC
• Language Competence Through
• Bilingual Teaching at Vocational Colleges

2
How is Internet useful?

• to find information quickly
• to send very fast e-mails everywhere and without
  charges
• to use e-services
• e-payments
• e-mail data (electricity, water)
• fill declarations
• make contracts

3
History of Internet

• 1960. a. beginning of military network in USA
• 1969. a. first network works! (4 computers -
  ARPANET)
• 1973 first European computers joined
• 1987 for free use
• 1992. a. Estonia joined

4
Structure of Internet
5
How to find server?

• every host has its own IP address
• according name to IP addresspol.khk.tartu.ee
  khk.tartu.ee tartu.ee
  ee

6
Principes

• Long messages to short pacets
• Pacets can move in different ways in different
  space of time
• IP (Internet Protocol)
• TCP (Transmission Control Protocol).

7
Important

• HTML 1993 Tim Berners-Lee
• Web browser 1993Mark Andreessen

8
Internet services

• WWW (World Wide Web)
• e-post
• real time chat
• mailing lists
• news groups
• teleconferencing

9
WWW

• WWW documents we name homepage To see web
  documents, we use special programmes - browsers

• Internet Explorer
• Netscape Navigator
• Opera
• Mozilla
• etc.

10
WWW (World Wide Web)

• WWW are hypertext documents
• It is electronical text with links to other
  documents or places
• hypertext could be a picture, a word, a sentence
  etc

11
Connecting

• All homepages have a unique address
• http//www.computer/directory/fail.html
• http//www.ut.ee

12
Addresses

• www.neti.ee
• www.riik.ee
• www.president.ee
• news papers
• www.epl.ee - Eesti Päevaleht
• www.postimees.ee - Postimees
• www.ekspress.ee - Eesti Ekspress

13
E-post

• quick
• hard and fast
• reliable
• free of charge

14
Electronpost - www.hot.ee
15
E-mail

• E-mail consists from head and body
• head includes
• To
• From
• CC
• BCC
• Subjectlines

16
E-mail address

• username_at_somewhere.domen
• MariTamm_at_hot.ee

17
Mailing lists

• For people with similar interests
• address for communicating with lists managing
  computer program TKHK-s ecartis_at_khk.tartu.ee
• address for communicating with members of the
  listkool_at_khk.tartu.ee

18
News Groups

• For people with similar interests
• USENET
• mails, you send to newsgroup, stay on newsgroup
  server

19
Internets Hidden Dangers

• hacker-phreak
• information leak
• changing data's without authorization
• faux mails

20
Minimizing security risks

• encrypt
• authentication
• firewalls
• give as few personal data's as possible
• dont give

21
Thank you!