What is one of the main roles of a DHCP server?

One of the main roles of a DHCP (Dynamic Host Configuration Protocol) server is to ensure that no two devices receive the same IP address. This process is essential for maintaining a properly functioning network. The DHCP server is responsible for dynamically allocating IP addresses to devices as they connect to the network. When a device connects, the DHCP server issues an IP address that is not currently in use, thereby preventing address conflicts that can lead to connectivity issues. This automatic management simplifies network configuration for administrators by eliminating the need for manual IP address assignment and minimizing the chances of errors that can arise from duplicate addresses.

The other roles mentioned, such as providing DNS services, managing network security, and routing traffic between networks, are functions typically handled by different network services or hardware rather than the DHCP server itself.