One problem of the DNS that it is static in nature, the DNS only know the records where every hostname has corresponding IP address. The DNS don’t know if the host is on or off .it event doesn’t know host is still there or not.

You don’t need a lot of requirements to implement Dynamic DNS .You need a computer server with small setup list .There is an important change you have which is to change the max –caching time intervals between caching of a domain to a short period (I mean so short) .This time may be 1 or 2 minutes .By this way you will avoid the storage of the original IP address, so the site visitors will update their information by connecting to the name server every time they visit you.

Due to the internet high speeds and using DDNS (Dynamic Domain Name System) websites are hosted at home computers with dynamic IP address. One the setups is amateur server setups