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7/26/2019 World wide web Architecture
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PRESENTATIONON
WORLD WIDE WEB ARCHITECT
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WHAT IS WORLD WIDE WEB.
World wide web Is a system of interlinked hypertext
that are accessed via the Internet with a web browse
Also known as www and w3.
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INTERNET
The Internet is a global system of interconnected comp
networks that use the standard Internet protocol suite
to link several billion devices worldwide. It is an
international networkofnetworks that consists of milprivate, public, academic, business, and government p
switched networks, linked by a broad array of electron
wireless, and optical networking technologies
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DIFFERENCE BETWEEN W3 &
INTERNET
The Internet is a global, interconnected network of comput
devices.
The World Wide Web (WWW) is one set ofsoftware services running on the Internet.
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W3 ARCHITECTURE
The www today is a distributed client/server service
client using a browser can access a service using a se
However, the service provided is distributed over mlocations called sites.
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W3 ARCHITECTURE
Protocols
Client server
HTML URL
URI
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W3 PROTOCOLS
HTTP (hypertext transfer protocol)
FTP (File transfer protocol)
TCP (TRANSMISSION CONTROL PROTOCOL)
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HTTP, FTP & TCP
HTTPThe Hypertext Transfer Protocol (HTTP) is a protocol
mainly to access data on the World Wide Web.
FTP
The File Transfer Protocol (FTP) is a standard network
protocol used to transfer computer files from one host to
host over a TCP-based network
TCP
TCP is connection orientedonce a connection is establi
can be sent bidirectional.
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CLIENT SERVER
Client request to server and server make response accordinrequest
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HTML
Hypertext Markup Language, a standardized system for
text files to achieve font, color, graphic, and hyperlink e
World Wide Web pages.
A markup language is a set of markup tags HTML documents are described by HTML tags
Each HTML tag describes different document content
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URI
a uniform resource identifier (URI) is a used to identify a na
of a resource. Such identification enables interaction with
representations of the resource over a network, typically
the World Wide Web, using specific protocols. Schemes
specifying a concrete syntax and associated protocols definURI. The most common form of URI is the uniform resource
locator (URL), frequently referred to informally as a web ad
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URL (UNIFORM RESOURCE
LOCATOR) Abbreviation of Uniform Resource Locator (URL)it is the glo
address of documents and other resources on the World W
Web.
The first part of the URL is called aprotocol identifierand it
indicates what protocol to use, and the second part is calledresource nameand it specifies the IP address or the domain
name where the resource is located.
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URN
URN stands for Uniform Resource Name. URN is also subse
URI
One of the best example of URN is ISBN number which is us
uniquely identify a book. URN is completely different than URL as it doesn't include a
protocol.
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DIFFERENCE BETWEEN URI, U
&URN
1) Every URL and URN is URI, because URI is super set of both
and URN.
2) URL includes protocol e.g. http://, ftp:// along with locatio
identify resource e.g. http://www.blogspot.com/abc.html.
3) URN are unambiguous way to identify a resource. ISBN nu
are best examples of URN.