What is the UDP port number assigned to a DHCP server?

The correct answer is UDP port number 67, which is specifically assigned to the DHCP (Dynamic Host Configuration Protocol) server. In the DHCP process, the client sends a discovery message to locate a DHCP server, and this message is sent to port 67, as this is where the DHCP server listens for incoming requests. Upon receiving the discovery request, the DHCP server responds from port 67 to the client, which is typically using port 68.

This distinction is crucial for understanding the DHCP communication flow: the server uses port 67 to listen for client requests, while clients respond and interact using port 68. Recognizing their respective roles enhances comprehension of the overall functionality of DHCP in assigning IP addresses and configuring network settings for devices automatically.