(The following may require editing as I'm not entirely sure)

DHCP stands for Dynamic Host Configuration Protocol and is an Internet protocol. It resides in a DHCP server (which could be a computer or router) and clients that use the server. A DHCP server supplies Internet Protocol (IP) addresses when requested by client computers on a TCP/IP network that have TCP/IP configured to obtain their IP addresses automatically. A DHCP server is configured to use a range of IP addresses known as its scope. It automatically and dynamically manages the allocation of IP addresses within its scope. IP addresses are assigned to clients under a lease arrangement that can be set to expire after a given time.

A router may have DHCP server software (built-in) to automatically assign private IPv4 or IPv6 addresses, subnet masks, and a default gateway to computers and other devices (nodes) on a network. A router or modem has their own dynamic or static WAN IP address assigned by the ISP's DHCP server.

Automatic Private IP addressing (APIPA) - 169.254.0.0 - 169.254.255.255\\