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Addressing Schemes - Types of Addressing Schemes

Every computer connected to an Internet has a unique address. A computer is accessed by its address. The address are assigned to the computers according to a set of rules. These rules are called addressing schemes.

On the Internet, two types of addressing schemes are used. These are:
  1. IP Addressing
  2. DNS Addressing
1- IP Addressing
    IP stands for Internet protocol. It is a unique identifier that is assigned to a computer on the Internet. It is a numerical address with four numbers separated with dots. The value of each number is between 0 and 255. These numbers are called octets. An example of IP address is: 216. 27. 61. 137.
Every computer on the Internet has a unique IP address. A server has a static IP address that does not change. When a user's computer connects to the ISP, it is assigned an IP address bi ISP. This IP address is unique for that session. It is not static. When the same computer will be connected next time, a different IP address will be assigned to it.

2- DNS Addressing
    DNS stands for Domain Name System. IP addresses are difficult to remember by the user. Every server (or host) on the Internet also has a unique name. The human readable name assigned to the computer (server) on the Internet is called the domain name. It is a common and unique text name and is alternative to an IP address. For example, "hotmail.com" is a permanent, human readable name. It is easier to remember than an IP Address.
The domain name has two parts, a host name and domain. The domain is also known as top-level domain (TLD) I. The top-level domain specifies the type of domain such as type of organization. It comes at the end of host name separated with dot.(.). The commonly used top level domains are:
  • .com  (Business)
  • .edu   (Educational institutes)
  • .gov   (Government organizations)
  • .org   (other organizations)
A way of assigning domain names to IP addresses is called Domain Name System (DNS). DNS server is used to store domain names and their corresponding IP addresses. The DNS server translates the domain name into the corresponding IP address.

2 Responses to “Addressing Schemes - Types of Addressing Schemes”

Anonymous said...
9 December 2014 at 09:22

Excellent. Was very much useful for me.


Anonymous said...
13 March 2016 at 09:44

Too gud.. easily understandable explanation .


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