You have configured a Cisco TelePresence endpoint with the default options. The DHCP server on your
network does not support DHCP option 150.
Which of the following must you manually configure on the endpoint?

A.
a static IP address

B.
the IP address of the default gateway

C.
the IP address of the NTP server

D.
the IP address of the TFTP server

E.
the IP address of the DNS server

Explanation:
You must manually configure the IP address of the Trivial File Transfer Protocol (TFTP) server on the endpoint.
Dynamic Host Configuration Protocol (DHCP) option 150 is used to configure a Cisco TelePresence endpoint
with the IP address of the 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, as it is in this scenario, 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.
Although you can configure a static IP address on the endpoint, you need not do so. The DHCP server will
dynamically assign an IP address to the endpoint even if the server does not support DHCP option 150.
You need not manually configure the IP address of the default gateway on the endpoint. DHCP option 3 is used
to configure a device with the IP address of the default gateway.
You need not manually configure the Domain Name System (DNS) server on the endpoint. DHCP option 6 is
used to configure a device with the IP address of a DNS server.
You need not manually configure the Network Time Protocol (NTP) server on the endpoint. DHCP option 42 is
used to configure a device with the IP address of an NTP server.

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