What is the maximum number of option 150 IP addresses that a Cisco IP SCCP phone will accept and
use from a DHCP server?

A.
1

B.
2

C.
3

D.
4

E.
5

Explanation:
Cisco Unified IP Phones use the option 150 value as the TFTP server IP address when Alternate TFTP
option is set to No. You can assign only IP addresses as Option 150 values. A maximum of two IP
addresses get used, and only the first two IP addresses that the DHCP server provides get accepted.

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/9_0_1/ccmsys/CUCM_BK_CD
2F83FA_00_cucm-system-guide-90/CUCM_BK_CD2F83FA_00_system-guide_chapter_01010.html