Dns records updating
The Dynamic Host Configuration Protocol (DHCP) allowed enterprises and Internet service providers (ISPs) to assign addresses to computers automatically as they powered up.
In addition, this helped conserve the address space available, since not all devices might be actively used at all times and addresses could be assigned as needed.
The Domain Name System brought a method of distributing the same address information automatically online through recursive queries to remote databases configured for each network, or domain.
Even this DNS facility still used static lookup tables at each participating node.
The first is "dynamic DNS updating" which refers to systems that are used to update traditional DNS records without manual editing.
Thus DNS is only suitable for services that do not change their IP address very often, as is the case for most large services like Wikipedia.The second kind of dynamic DNS permits lightweight and immediate updates often using an update client, which do not use the RFC2136 standard for updating DNS records.These clients provide a persistent addressing method for devices that change their location, configuration or IP address frequently.Dynamic IP addresses present a problem if the customer wants to provide a service to other users on the Internet, such as a web service.As the IP address may change frequently, corresponding domain names must be quickly re-mapped in the DNS, to maintain accessibility using a well-known URL.