THE INTERNET ADDRESS

What is IP Address ?
  • A number that uniquely identifies each computer or device connected to the Internet.
  • IP addresses are also referred to as IP numbers and Internet addresses.
  • IP address sometimes is called a dotted decimal number or dotted quad.
IP usage
  • A way to find specific server or computer on the internet or a network.
  • Identify for a particular device/machine on a particular network.
  • Allows transfers of files and e-mail.
IP structure
  • IP addresses usually consists of four groups of number each separated by a period.
  • The number in each group is between 0 and 255.
  • It is 32 bit long, each group is 8 bits long.
IP versions

Two versions of the Internet Protocol (IP) are in use:
  •  IP Version 4 (IPv4) 
  •  IP Version 6 (IPv6)

Domain names and IP addresses

  • People prefer to use easy-to-remember names instead of IP addresses.
  • The domain name system (DNS) is an Internet-wide distributed database that translates between domain names and  IP addresses.
Internet Address
Domain name 
The text version of an IP address.
Generally,
First portion of each IP address identifies the network
Last portion identifies the specific computer
Top-level domains (TLDs) 
  • The first-level set of domain names are the top-level domains (TLDs).
  • Three types of top-level domains name:
        Organizational: 3-character code indicates the function of the                                    organization
                                  Used primarily within the US 
                                   Examples: gov, mil, edu, org, com, 
        Geographical: 2-character country or region code
                                  Examples: us, va, jp, de
        Reverse domains: A special domain (in-addr.arpa) used for IP                                     address-to-name mapping




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