what is web 2.0,website, blog, search engine etc?

1. PREPARED BY ANJU A
GUEST LECTURER
DEPARTMENT OF ENGLISH
PAYYANUR COLLEGE

3. Web 2.0
• Web 2.0, also called Participative (or Participatory) and Social Web
• refers to World Wide Web websites that emphasize user-generated
content
• Web 2.0 is the name used to the describe the second generation of
the world wide web, where it moved static HTML pages to a more
interactive and dynamic web experience.
• Web 2.0 is focused on the ability for people to collaborate and share
information online via social media, blogging and Web-based
communities.

4. Web 2.0
• Second generation of WWW
• In the 1st generation -90’s of the last century- affordances were limited to
viewable or downloadable content
• Web 2.0 paved way for new participatory culture
• It is more personalised, communicative form of www
• It enables the users to
• actively participate in the deliberations
• exchange ideas
• share multimedia content
• Creatively involve in other interactive endeavours

5. Web 2.0 applications are used in:
• Web logs (blogs)
• Freely editable wikis
• RSS (Really Simple Syndication)-is a type of web feed which allows
users to access updates to online content in a standardized,
computer-readable format.
• Websites usually use RSS feeds to publish frequently updated
information, such as blog entries, news headlines, audio, video.

6. Web 2.0 applications are used in:
• Podcasting-
A podcast or generically netcast, is an episodic series
of digital audio or video files which a user can download in order to listen to.
• Social networking sites
• Tag-based folksonomies- social tagging
• Peer-to-peer (P2P) media sharing utilities
Bit torrent, Ares Galaxy, eMule etc.

7. WEB 2.0
 Web 2.0 is often referred to as Read-Write-Web
 Enables customization, personalization and provides rich
opportunities for networking and collaboration.
 It is a social software with sociability aspects
 Openness is a characteristic hallmark of web 2.0
 Fosters participatory culture and is the architecture of participation
 Furthers collective intelligence or wisdom of crowds

12. • Is a collection of pages containing valuable
information and knowledge about a particular place,
thing, service or specialised field of study (or anything
under the sun), stored in the form of text, image,
video, and various other multimedia contents.
• Each website, and all its pages, has a unique address
known as a URL.

13. URL
• URL is the abbreviation of Uniform Resource Locator and is
defined as the global address of documents and
other resources on the World Wide Web.

14. DNS (Domain Name System)
• is a hierarchical decentralized naming system
for computers, services, or other resources connected
to the Internet or a private network.
• has been in use since 1985.

15. DOMAIN SUFFIX
• Is the last part of a domain name.
• Often referred to as a “top-level domain” or TLD
Popular domain suffixes:
“.com”
“.net”
“.org”

16. ICANN
• Internet Corporation for Assigned Names and
Numbers is a nonprofit organization
responsible for coordinating the maintenance
and procedures of several databases related to
the namespaces and numerical spaces of the
Internet, ensuring the network's stable and
secure operation.

17. Countries and Their Domain
Extensions
.uk United Kingdom
.sa Saudi Arabia
.so Somalia
.zw Zimbabwe

18. al Albania
am Armenia
an Netherlands Antilles
ao Angola
aq Antarctica
ar Argentina
as American Samoa
at Austria
au Australia
aw Aruba
cg Congo
ch Switzerland
ci Cote d'Ivoire (Ivory Coast)
ck Cook Islands
cl Chile
cm Cameroon
cn China
co Colombia
com US Commercial
cr Costa Rica
cs Czechoslovakia (former)
cu Cuba
cv Cape Verde
cx Christmas Island
cy Cyprus
cz Czech Republic
de Germany

19. dj Djibouti
dk Denmark
dm Dominica
do Dominican Republic
dz Algeria
ec Ecuador
edu US Educational
ee Estonia
eg Egypt
eh Western Sahara
er Eritrea
es Spain
et Ethiopia
fi Finland
fj Fiji
fk
Falkland Islands
(Malvinas)
fm Micronesia
fo Faroe Islands
fr France
fx France (Metropolitan)
ga Gabon
gb Great Britain (UK)
gd Grenada
ge Georgia
gf French Guiana
gh Ghana
gi Gibraltar
gl Greenland

20. • Traditional one
• Content can only be read or
downloaded
• It is Interactive .
• Eg. blogs,social networking
and e-commerce sites

21. HTTP
• HTTP (Hypertext Transfer Protocol)is the set of
rules for transferring files(text, graphic images, sound,
video, and other multimedia files) on the World Wide Web.
• Protocol: A Protocol is a standard procedure for defining and
regulating communication. For example TCP, UDP, HTTP etc.

22. • IP Address: An Internet Protocol address (IP address) is a
numerical label assigned to each device (e.g., computer,
printer) participating in a computer network that uses the
Internet Protocol for communication.

23. • TCP :Transmission Control Protocol
(TCP) is one of the two original core protocols of the Internet Protocol
Suite (IP), and is so common that the entire suite is often called
TCP/IP. TCP provides reliable, ordered, error-checked delivery of a
stream of octets between programs running on computers connected
to an intranet or the public Internet.

24. • Port Number : A port number is a 16 bit number which when
associated with IP address , completes the destination address for a
communications session.
•Socket : A socket is nothing but a
combination of IP address and port
number.
It is simply an end while communication.

25. Define the IP Address
• A computer data network assigns a number called an Internet
Protocol (IP) address to every computer and device connected to it.
For example, your company’s Wi-Fi network might host many devices
– smartphones, wireless printers and laptops. Each has an IP address,
which works like the street address of a house or business. For
example, when you print an invoice from a laptop, the network routes
the data from the laptop to the printer using its IP addresses. IP
addresses have two main formats: four decimal numbers each up to
three digits long, separated by dots, or eight hexadecimal (base-16)
numbers separated by colons. An IP address might look like
“192.168.1.67” or “2600:1700:7170:fb10:93:ac4c:810e:6785.”

26. HYPERTEXT/HYPERMEDIA
LINKS

28. HYPERTEXT/HYPERMEDIA LINKS
• Hypertext is text displayed on a computer display or
other electronic devices with references (hyperlinks) to other
text that the reader can immediately access, or where text can be
revealed progressively at multiple levels of detail (also
called StretchText)
HYPERTEXT:- It is a text which contains links to other texts.
HYPERMEDIA :-Combines text based links with graphic audio and
video links

32. Search engine
• A web search engine is a software system that is designed to search
for information on the World Wide Web.
• Web search engines are all about programmes that help you to
narrow down your limitless choices of websites and zero in on the
right one.
• Search engines are important with over 8 billion web pages available,
it would be impossible to search for the information that is
specifically needed.
• This is why search engines are used to filter the information that is on
the internet and transform it into results that each individual can
easily access and use within the matter of seconds.

33. Types of search engines
• Crawler based search engines
• Directories
• Specialty search engines
• Meta search engine
• Hybrid search engine

34. Crawler based search engines
• Crawler based search engines are search engines that use software
programs that are called 'spiders', ‘crawlers’, ‘robots’ , ‘bots’ .
• These programs can access the webpages to categorize and analyse them
and then add them in the search engine data base, where any user can find
them when searching.
• The crawler based search engines are constantly updated with new
webpage that would be available in their database.
• Examples
• Google
• Yahoo
• Ask.com