You are nearing the completion of an upgrade that involves implementing new network infrastructure and upgrading the operating systems running on your network servers. Currently, static IP addresses and HOSTS files are used. The upgrade has included implementing DNS, implementing DHCP, and moving servers and other resources to a new location with new IP addresses. However, you cannot access the resources that were moved using their host names from any of the client workstations. You can access them by their IP addresses. What should you do first