Which of the following DHCP options can be used to configure a Cisco TelePresence endpoint with the IP
address of the TFTP server that contains its configuration file?

A.
option 3

B.
option 6

C.
option 51

D.
option 66

E.
option 150

Explanation:
Dynamic Host Configuration Protocol (DHCP) option 150 can be used to configure a Cisco TelePresence
endpoint with the IP address of the Trivial File Transfer Protocol (TFTP) server that contains its configuration
file. The endpoint will attempt to download its configuration file from the Cisco TFTP server whenever the
endpoint boots. If the configuration file downloads successfully, the endpoint will register with Cisco Unified
Communications Manager (CM).
If DHCP option 150 is unavailable, the TFTP server address must be configured manually. From the web
interface, select Configuration > System Configuration > Provisioning and enter the IP address of the TFTP
server as the External Manager address.
DHCP option 3 is not used to configure a Cisco TelePresence endpoint with the IP address of the TFTP server.
DHCP option 3 is used to configure a device with the IP address of the default gateway.
DHCP option 6 is not used to configure a Cisco TelePresence endpoint with the IP address of the TFTP server.
DHCP option 6 is used to configure a device with the IP address of a Domain Name System (DNS) server.
DHCP option 51 is not used to configure a Cisco TelePresence endpoint with the IP address of the TFTP
server. DHCP option 51 is used to configure a device with a lease time, which is the amount of time that the
device may use the leased IP address.
DHCP option 66 is not used to configure a Cisco TelePresence endpoint with the IP address of the TFTP
server. However, DHCP option 66 is the standards-based method that is used to configure other devices with
the IP address of a TFTP server.

Cisco: Cisco TelePresence Video Systems, Getting Started Guide: Provisioning setup (PDF)