When troubleshooting a phone that is unable to get an IP address from a DHCP server, what is
the first thing to check for on the phone?

A.
Make sure that DHCP Enabled is disabled on the phone.

B.
Make sure that the phone is getting the proper VLAN information.

C.
Make sure that the TFTP server address is correct on the phone.

D.
Make sure that the DHCP scope has enough addresses left in the range.

E.
Make sure the phone has the correct phone load ID.

Explanation:
IP phones rely on a TFTP-based process to acquire configuration files, software
images, and other endpoint-specific information. The Cisco TFTP service is a file serving system
that can run on one or more Unified CM servers.

Link: http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/8x/netstruc.html#wp1185040