Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Internet Overview: A Basic Introduction to the Information Superhighway, Lecture notes of Computer Networks

dasdas lsajhadslghsdlgjhladshblaskjd

Typology: Lecture notes

2018/2019

Uploaded on 11/13/2019

kalaiyarasan
kalaiyarasan 🇺🇸

2 documents

1 / 4

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Internet Overview
Internet Overview
Internet
Internet
Internet is defined as an Information super Highway, to access information over the web. However, It
Internet is defined as an Information super Highway, to access information over the web. However, It
can be defined in many ways as follows:
can be defined in many ways as follows:
Internet is a world-wide global system of interconnected computer networks.
Internet is a world-wide global system of interconnected computer networks.
Internet uses the standard Internet Protocol (TCP/IP).
Internet uses the standard Internet Protocol (TCP/IP).
Every computer in internet is identified by a unique IP address.
Every computer in internet is identified by a unique IP address.
IP Address is a unique set of numbers (such as 110.22.33.114) which identifies a computer
IP Address is a unique set of numbers (such as 110.22.33.114) which identifies a computer
location.
location.
A special computer DNS (Domain Name Server) is used to give name to the IP Address so
A special computer DNS (Domain Name Server) is used to give name to the IP Address so
that user can locate a computer by a name.
that user can locate a computer by a name.
For example, a DNS server will resolve a name
For example, a DNS server will resolve a name http://www.tutorialspoint.com
http://www.tutorialspoint.com to a
to a
particular IP address to uniquely identify the computer on which this website is hosted.
particular IP address to uniquely identify the computer on which this website is hosted.
Internet is accessible to every user all over the world.
Internet is accessible to every user all over the world.
Evolution
Evolution
The concept of Internet was originated in 1969 and has undergone several technological &
The concept of Internet was originated in 1969 and has undergone several technological &
Infrastructural changes as discussed below:
Infrastructural changes as discussed below:
The origin of Internet devised from the concept of
The origin of Internet devised from the concept of Advanced Research Project Agency
Advanced Research Project Agency
Network (ARPANET).
Network (ARPANET).
pf3
pf4

Partial preview of the text

Download Internet Overview: A Basic Introduction to the Information Superhighway and more Lecture notes Computer Networks in PDF only on Docsity!

Internet OverviewInternet Overview

Internet

Internet

Internet is defined as an Information super Highway, to access information over the web. However, It

Internet is defined as an Information super Highway, to access information over the web. However, It

can be defined in many ways as follows:

can be defined in many ways as follows:

Internet is a world-wide global system of interconnected computer networks. Internet is a world-wide global system of interconnected computer networks.

Internet uses the standard Internet Protocol (TCP/IP).

Internet uses the standard Internet Protocol (TCP/IP).

Every computer in internet is identified by a unique IP address. Every computer in internet is identified by a unique IP address.

IP Address is a unique set of numbers (such as 110.22.33.114) which identifies a computer

IP Address is a unique set of numbers (such as 110.22.33.114) which identifies a computer

location.

location.

A special computer DNS (Domain Name Server) is used to give name to the IP Address so

A special computer DNS (Domain Name Server) is used to give name to the IP Address so

that user can locate a computer by a name.

that user can locate a computer by a name.

For For example,example, aa DNSDNS serverserver willwill resolveresolve aa namename http://www.tutorialspoint.comhttp://www.tutorialspoint.com toto aa

particular IP address to uniquely identify the computer on which this website is hosted.

particular IP address to uniquely identify the computer on which this website is hosted.

Internet is accessible to every user all over the world.

Internet is accessible to every user all over the world.

Evolution Evolution

TheThe conceptconcept ofof InternetInternet waswas originatedoriginated inin 19691969 andand hashas undergoneundergone severalseveral technologicaltechnological &&

Infrastructural changes as discussed below:

Infrastructural changes as discussed below:

The origin of Internet devised from the concept of

The origin of Internet devised from the concept of Advanced Research Project Agency

Advanced Research Project Agency

Network (ARPANET). Network (ARPANET).

ARPANET

ARPANET

was developed by United States Department of Defense.

was developed by United States Department of Defense.

Basic purpose of ARPANET was to provide communication among the various bodies of Basic purpose of ARPANET was to provide communication among the various bodies of

government.

government.

Initially, there were only four nodes, formally called

Initially, there were only four nodes, formally called Hosts.

Hosts.

In 1972, the

In 1972, the ARPANET

ARPANET

spread over the globe with 23 nodes located at different countries

spread over the globe with 23 nodes located at different countries

and thus became known as

and thus became known as Internet.

Internet.

By the time, with invention of new technologies such as TCP/IP protocols, DNS, WWW, By the time, with invention of new technologies such as TCP/IP protocols, DNS, WWW,

browsers, scripting languages etc.,Internet provided a medium to publish and access

browsers, scripting languages etc.,Internet provided a medium to publish and access

information over the web.

information over the web.

Advantages

Advantages

Internet covers almost every aspect of life, one can think of. Here, we will discuss some of the

Internet covers almost every aspect of life, one can think of. Here, we will discuss some of the

advantages of Internet:

advantages of Internet:

Internet allows us to communicate with the people sitting at remote locations. There are

Internet allows us to communicate with the people sitting at remote locations. There are

various apps available on the wed that uses Internet as a medium for communication. One various apps available on the wed that uses Internet as a medium for communication. One

can find various social networking sites such as:

can find various social networking sites such as:

Facebook

Facebook

Twitter

Twitter

Yahoo

Yahoo

Google+

Google+

Flickr

Flickr

Orkut

Orkut

There are always chances to loose personal information such as name, address, credit card

There are always chances to loose personal information such as name, address, credit card

number. Therefore, one should be very careful while sharing such information. One should

number. Therefore, one should be very careful while sharing such information. One should

use credit cards only through authenticated sites.

use credit cards only through authenticated sites.

Another disadvantage is the

Another disadvantage is the Spamming

Spamming .Spamming corresponds to the unwanted e-mails in

.Spamming corresponds to the unwanted e-mails in

bulk. These e-mails serve no purpose and lead to obstruction of entire system.

bulk. These e-mails serve no purpose and lead to obstruction of entire system.

Virus Virus can easily be spread to the computers connected to internet. Such virus attacks maycan easily be spread to the computers connected to internet. Such virus attacks may

cause your system to crash or your important data may get deleted.

cause your system to crash or your important data may get deleted.

Also a biggest threat on internet is pornography. There are many pornographic sites that can

Also a biggest threat on internet is pornography. There are many pornographic sites that can

be found, letting your children to use internet which indirectly affects the children healthy be found, letting your children to use internet which indirectly affects the children healthy

mental life.

mental life.

There are various websites that do not provide the authenticated information. This leads to

There are various websites that do not provide the authenticated information. This leads to

misconception among many people. misconception among many people.