6
Web
Technology
A 32-bit based address typically is represented as shown in the Address Structure figure. It consists of
four sections with each section represented by an octet.
e domain name service (DNS) makes it easier for users to use the IP address.
e unique logical
IP address representing the host computer is rather cumbersome to type in and remember, so it is
substituted by human friendly names like www.abc.com. Accordingly, it does Forward Lookup (from
Hostname to IP address) and also Reverse Lookup (from IP address to Hostname). DNS also enables
E-Mails to function properly. In summary, DNS is used for the following:
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