CCNP Routing and Switching ROUTE 300-101 Official Cert Guide

Finding the DNS IP Addresses Using Stateless DHCP

Although the DHCP server function for IPv4 does not explicitly use the word “stateful” in its name, IPv4 DHCP servers keep state information about DHCP clients. The server keeps a record of the leased IP addresses and when the lease expires. The server typically releases the addresses to the same client before the lease expires, and if no response is heard from a DHCP client in time to renew the lease, the server releases that IP address back into the pool of usable IP addresses—again keeping that state information. The server also has configuration of the subnets in use and a pool of addresses in most subnets from which the server can assign IP addresses. It also serves other information, such ...