The Need for DNS

Computers that are connected to a network are identified by a unique address called the MAC address or the hardware address of the computer. However, because the hardware address is dependent on the hardware technology used, an addressing scheme, called the IP addressing scheme, was created. This can be used independent of the hardware technology. The IP address is also called the software address of a computer.

The Network layer requires the hardware addresses for transferring data over the physical medium. To convert IP addresses to hardware addresses, Address Resolution Protocol (ARP) is used. In spite of providing access to computers irrespective of the underlying hardware technology, IP addresses have a limitation. Users ...

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