All hosts in the networks have been operational for several hours when the DHCP server goes down. What happens to the hosts that have obtained service from the DHCP server? A. The hosts will not be able to communicate with any other hosts. B. The hosts will continue to communicate normally for a period of time. C. The hosts will be able to communicate with hosts outsides their own network D. The hosts will only be able to communicate with other hosts by IP address not by host name