Sunday 8 April 2012

IP address


IP address stands for Internet Protocol. Each and every computer on the internet has a IP address.  IP address is the identity of a computer. We can classify IP address in the following two ways. IP address is used to send mail or information across the internet world wide.

IP address are of two types:
  1. Local
  2. Global 
Local IP address is for local computer . It is the local identity of a computer. You can find the a local IP address of any computer by simply following this step:

  • Go to "start"
  • Open Command prompt or cmd
  • There you type "ipconfig"
There you see something like this below::

 In the above picture you see
IP Address in this case is 80.215.223.18
Subnet Mask  is 255.255.255.255, and
Default Gateway is 80.215.223.18

This means that your IP address in Local area is 80.215.223.18.
Now you are thinking that "What is Subnet Mask?"
Subnet Mask is it's the way that network devices know where they stand on a network.
In this case 255.255.255.255 means a class E
There is table which shows you the range of classes:
                                  Class                                            Range
                                    
                                     A                                         0.0.0.0     to 126.255.255.255
                                     B                                         127.0.0.0 to 191.255.255.255
                                     C                                         192.0.0.0 to 223.255.255.255
                                     D                                         224.0.0.0 to 239.255.255.255
                                     E                                          240.0.0.0 to 255.255.255.255

Default Gateway is the router to which one computer addresses packet information for data for a computer on another network.

Global IP address is used world wide. It is also used to locate someone world wide. You can find the Global IP address of your computer by simply typing what is my ip in Google or by going to a website whatismyip.com or whatismyipaddress.com
or you can try many other websites.