This document discusses DHCP and its operations. It explains how DHCPv4 works in a small to medium business network by dynamically assigning IPv4 addresses from a pool. It also covers configuring a router as a DHCPv4 server and client. For DHCPv6, it describes the stateless and stateful address autoconfiguration options and how to configure routers for each. The document provides instructions for troubleshooting DHCPv4 and DHCPv6 configurations.