The Internet

2.1 Introduction

the internet is the physical network of computers on which information travels.

තොරතරු ගමන් කිරීම සදහා සදා තිබෙන භෙතික පරිගණක දැල

virtual resources

cloud computing

2.2 components of the internet. (අන්තර්ජාලයේ සංරචක).

1. world wide web ලෝක ව්‍යාප්ත ජාලය. වි්ස්ව විසිර වියමන.
2. e-mail
3. news group / discussion groups
4. Listserv
5. File Transfer Protocol
6. Conferencing / chat
7. Telnet
8. Multi User Dimension (MUD)

2.3 Evolution of the Web

introduced by - tim berners lee  

(picture : tim berners lee .)

versions of web

(Figure: 2.0 : versions of web :https://chamnanvanakit.files.wordpress.com/2013/08/web3_3.jpg)

how many people used

(Figure 2.1 : the Changing interweb : https://it-pr-saja.wikispaces.com/file/view/web1to31.jpg/523157648/708x494/web1to31.jpg)

(figure  2.2 : Information to Knowledge

2.4.0 Method of Finding information on the WEB / searching information on the web

4.1  Access  - ප්‍රවේශ වීම.

that need a web browser there are so many browsers

(figure 2.3 : different web browsers :  http://hautesecure.com/wp-content/uploads/2012/11/browsers-icons.png)

4.2. using an internet address

we should remember an internet address . we can access web sites using address. that address should type in address bar.

eg. www.nie.lk , www.e-thaksalawa.moe.gov.lk , www.vidumanpetha.com,  www.ixl.com ,

4.2.1 Anatomy of URL

(figure 2.4 : anatomy of URL http://www.people.vcu.edu/~gasaunde/201001INFO202URLAnatomy.pdf )

Internet address of URL

4.2.2. Domain Names

the text is in before second / mark after protocol.

.edu  - education

.com - Commercial

4.2.3. Domain names(country of origin)

.ch = switzerland

.de = Germany

.my = Malayasiya

.lk = Lanka

(figere : 2.5 : Country Codes : http://thumbs.dreamstime.com/z/country-code-top-level-domain-world-map-13023859.jpg )

reffer - https://en.wikipedia.org/wiki/List_of_Internet_top-level_domains

4.2.4 Private Web Address

after / before domain if there is a symbol like ~, % , Name is private web address

Tilde mark   ~

Percentage Mark  %

Name  Mike

referring address

https://en.wikipedia.org/wiki/Pistachio

down arrow mark that end of the sentence

cache - place of information

similar - සමාන වෙනත් ලිපි.

4.3 Website Evaluation

there are some models to evaluate a site

AAOCC model

finding the author of article by Truncate

URL should truncate for home page. there should have author details.

Eg: www.sundaytimes.lk/.../pistachios-can-protect-the-hearts-of-diabetics-11…

find Publiser by using www.easywhois.com