You are a network administrator at Certkiller . You want to keep your IP telephony network form failing if the IP phones lose connectivity with the DNS server. What should you do?

A.
Nothing, DNS is required.

B.
Configure the TFTP server as a WINS server.

C.
Rename the Cisco CCM server name to its IP address.

D.
Configure the IP phones to use WINS as a backup to DNS.