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Network and internet fundamental

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Information about Network and internet fundamental
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Published on December 8, 2013

Author: vtc-neila

Source: slideshare.net

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Network and internet fundamental
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INTERNET, WWW AND E-MAIL TOPIC1: NETWORK AND INTERNET FUNDAMENTAL

OUTLINES  NETWORK COMPONENTS  WHAT IS NETWORK  TYPES OF NETWORKS  BENEFITS  RISK OF NETWORK COMPUTING  INTERNET HISTORY  WHAT IS INTERNET  WHAT IS INTRANET  WHAT IS EXTRANET

NETWORK DEFINITION  A network is a set of devices connected by communication links.  The connections ( Network Link) between nodes are established using either cable media or wireless media  The best known computer network is the Internet

NETWORK COMPONENTS Computer (sender+ receiver) 2. Message 3. Protocol 1.

BENEFITS OF NETWORK  Resource sharing –Printer, processing power, disk space etc –Reduces cost  Communication –Email, chatting, video conferencing

RISK OF NETWORKS COMPUTING  The risk of leakage of authenticated data on the network by the attack of hackers.

TYPES OF NETWOKS

LAN Privately owned over a small area(500 m)

MAN Bigger version of LAN, Covers an area as big as a city

WAN Covers whole nation or continent

INTERNET HISTORY

INTERNET  The largest network of networks in the world.  Uses TCP/IP protocols and packet switching.  Runs on any communications substrate

PACKET SWITCHING  A mode of data transmission in which a message is broken into a number of parts  that are sent independently,  over whatever route is optimum for each packet,  and reassembled at the destination.

WHAT IS PROTOCOL  A protocol is the special set of rules that end points in a telecommunication connection.  use when they communicate.

TCP/IP PROTOCOL  Transmission Control Protocol/Internet Protocol: TCP/IP  Is the basic communication language OR protocol of Internet.

TCP: TRANSMISSION CONTROL PROTOCOL  Is one of the core protocol of the internet protocol suite.  Specify how data should be formatted, addressed  When you are set up with direct access to the internet, your computer is provided with a copy of the TCP/IP program  just as every other computer that you may send message to or get information from also has a copy of TCP/IP.

IP: INTERNET PROTOCOL  Internet protocol  Handles the address part of each packet so that it gets to the right destination.

HOW TCP/IP WOPRKS How data travels over

INTRANET  A network based on TCP/IP protocols (an internet) belonging to an organization,  Is a collection of private computer networks within an organization.  accessible only by the organization's members, employees, or others with authorization.

EXTRANET  refers to an intranet that is partially accessible to     authorized outsiders. An extranet provides various levels of accessibility to outsiders. You can access an extranet only if you have a valid username and password, and your identity determines which parts of the extranet you can view. Extranets are becoming a very popular means for business partners to exchange information.

TERMENOLOGY Memex  the most important mechanism, conceived by Vannevar Bush  Brush introduced the idea for a microfilm based machine for storing and retrieving knowledge.  It considered as closed to the modern hypertext system .

TERMENOLOGY Mathematical theory of communication:  is an influential 1948 .  Article by mathematician Claude E. Shannon.  Claude Shannon demonstrate how to generate “English looking” text using Markov chains.  www.khanacademy.org/math/applied-

TERMENOLOGY Silicon Chip:  was first discovered by Jack S Kilby at Texas in 1958,  that are imprinted onto a tiny chip of a semiconducting material, such as Silicon .  It’s an electronic equipment consisting of a small crystal of silicon semiconductor fabricated to carry out a number of electronic function in an integrated circuit  Example: microprocessor chip

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