What is a dynamic IP address?

A dynamic IP address is one that is assigned by a Dynamic Host Configuration Protocol (DHCP) server to a device when it connects to a network. This means that the device does not retain the same IP address each time it connects, allowing for more efficient use of IP address resources. As devices join and leave the network, the DHCP server allocates available IP addresses from a pool, changing the address assigned to each device based on availability.

This dynamic assignment facilitates easier management of devices on a network, especially when multiple devices connect and disconnect frequently, as it avoids the need for a dedicated permanent IP address for each device. It is common in both home networks and business environments, providing flexibility and reducing administrative overhead.

The other options describe different types of IP addresses or characteristics that do not align with the definition of a dynamic IP address. Permanent addresses that do not change refer to static IP addresses, while private addresses are meant for use within local networks and not accessible from the internet. Non-routable addresses pertain to specific address ranges that have limited functionality on the global internet.