The IP address is generated dynamically along with every new browsing session by the internet provider. Therefore, every new dial-up will generates a new IP address or at least once a day, so the assignment of IP addresses can be done more efficiently, the dynamic method can take the unused addresses into consideration. Dynamic IP addresses also contribute to website security as they lower the risk of identification and external attacks.
Other than dynamic IP addresses, static addresses are also used — most commonly if the IP belongs to a page, so that websites can be easily found by the users. This is why the Domain Name System (DNS) was established. A domain name like www.mondoze.com is much easier to remember than a number sequence. Each domain name leads to a web server with a fixed IP address.