Internet:
Internet is a collection of millions of computers around the
world that are connected to one another
It is a global network of computers.
These computers are connected through various types of
communication links such as:
1. 1. Phone
lines
2. Fibreoptics lines
3. Satellites
4.
Wireless connections.
Internet is used to find
information on the computers called hosts or servers.
These computers use a common
protocol called TCP/IP for communication.
TCP/IP means Transmission control
protocol / Internet protocol.
Each computer connected to the
internet can act as a host.
A host computer provides
information to the people.
Uses of Internet:
It helps people find information
about books,encycopedias,magazines etc.
It can help one find knowledge on
any topic.
As a result of internet ,the
world has become global village.
Address Schemes:
Each computer on the internet has
a unique address.
There are two types of addressing
schemes on the internet:
1.IP Addressing:
This is unique number given to a computer connected
on the internet.
IP means internet protocol.This
address is a 32 bit number.
An example of IP address is :
132.42.133.28
A server on the internet has a
static IP address.
Whenever a computer connects to
the internet,it will get an IP address by Internet Service Provider (ISP):
2.DNS Address / Domani Name System:
Domain name refers to names
assigned to servers that can easily be read by humans.
This is useful because IP
addresses are difficult to remember.
A domain name hence consists of
text instaed of numbers.
Example:
www.google.com
is a human readable name.
The domain represents the
institution that used the addresses.
Example:
.com is a domain used by
commercial organizations.
.org is a domain used by
non-profit organizations.
.net is used by network providers.
.edu id used by educational
institutions.
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