Which protocol does an IPv4 host use to obtain a dynamically assigned IP address?

An IPv4 host typically uses the DHCP (Dynamic Host Configuration Protocol) to obtain a dynamically assigned IP address. DHCP is a network protocol that allows a server to automatically assign IP addresses and other network configuration information to devices on a network. This dynamic assignment of IP addresses eliminates the need for manual configuration, making it more efficient and scalable, especially in large networks.

By using DHCP, network administrators can efficiently manage and allocate IP addresses without the need for manual configuration on each device. DHCP also allows for the central administration of IP address leases, making it easier to control and monitor the network's addressing scheme. DHCP is widely used in both small and large networks to streamline the process of IP address assignment and configuration.