What method allows for the management of IP addressing without manual configuration in a network?

Dynamic IP assignment is the method that allows for the management of IP addressing without manual configuration in a network. This approach typically utilizes the Dynamic Host Configuration Protocol (DHCP), which automatically assigns IP addresses to devices on a network. When a device connects, it sends a request to the DHCP server, which then provides an available IP address along with other configuration details, like the subnet mask and default gateway.

This automated process is efficient and reduces the potential for configuration errors that often occur with manual setups. Dynamic IP assignment is particularly advantageous in environments where devices frequently join and leave the network, such as in enterprise or home networks, as it simplifies network management and enhances mobility.

In contrast, static IP assignment requires the manual configuration of each device's IP address, which can be time-consuming and prone to errors, especially in larger networks. Subnetting is a technique used to divide a network into smaller segments, but it does not inherently manage IP address assignments dynamically. IPSec relates to securing communication over IP networks and does not pertain to the management of addressing itself.