You are a network administrator at Certkiller . Your newly appointed Certkiller trainee wants to know at what point during the boot process the IP phone tries to resolve CCM server name via DNS. What will your reply be?

A.
After the DHCP acknowledgment.

B.
Just before the DHCP acknowledgment.

C.
After the TFTP server serves the configuration file.

D.
Before the TFTP server serves the configuration file.