An engineer is configuring IP telephony. The network relies on DHCP to provide TFTP server addresses to the endpoints. Policy requires the endpoints to receive two server addresses. Which DHCP option must be configured?
The correct answer is C. DHCP Option 150.
Here's why:
DHCP Option 150 is used specifically for Cisco IP phones to provide one or more TFTP server addresses.
It supports multiple TFTP server addresses, making it ideal for environments requiring redundancy or load balancing.
Other options like Option 66 only support a single TFTP server address, which does not meet the requirement for two addresses.
With Option 66 you can actually have multiple TFTP servers referenced within DNS if you use FQDN. However, the most applicable answer where both options are presented is C.
There is another question which only has the Option 66 for one TFTP server. In that instance Option 66 is correct. In this case, since we have 2 TFTP servers, it would be Option 150
Option 66 provides a single TFTP server address. Option 150 provides a list of TFTP server addresses. Also if both are configured, Cisco phones will target 150 by default before 66.
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