350-401 Infrastructure Practice Question
A network administrator is configuring a Cisco IOS router to act as a DHCP server for a subnet. The administrator wants to ensure that the router assigns IP addresses to clients and also provides them with the IP address of a TFTP server for configuration files. Which DHCP option should the administrator configure to provide the TFTP server address?
⚠ Common exam trap
Many exam-takers confuse option 66 with option 67 or option 150, which serve different purposes such as specifying the bootfile name or providing a list of TFTP servers for IP phones.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Option 66
DHCP option 66 is the standard option for specifying the TFTP server name or IP address. Configuring this option in the DHCP pool allows clients to learn the TFTP server address, which they can use to download configuration files. This is the correct choice for providing the TFTP server address to DHCP clients.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Option 67
Why it's wrong here
DHCP option 67 is used to specify the bootfile name, not the TFTP server address. It tells the client which file to request from the TFTP server. While often used in conjunction with option 66, it does not provide the server's IP address. Configuring option 67 alone would not supply the TFTP server address, so it does not meet the requirement.
- ✓
Option 66
Why this is correct
DHCP option 66 is used to specify the TFTP server name or IP address. In Cisco IOS, this is configured with the 'option 66 ip <ip-address>' command within the DHCP pool. This option is commonly used for IP phones and other devices that need to download configuration files from a TFTP server. Therefore, it is the correct choice to provide the TFTP server address.
- ✗
Option 43
Why it's wrong here
DHCP option 43 is used for vendor-specific information, often for wireless access points to discover controllers. It is not used to provide a TFTP server address for general clients. While it can carry sub-options, it is not the standard method for TFTP server provisioning. Therefore, it is incorrect for this scenario.
- ✗
Option 150
Why it's wrong here
DHCP option 150 is used to provide a list of TFTP server addresses, but it is primarily for Cisco IP phones and is not the standard option for general TFTP server provisioning. Option 66 is the standard for specifying a single TFTP server name or address. Option 150 can be used, but it is not the most appropriate for this scenario, which does not specify IP phones.
Visual reference
Go deeper
Related to this question
About these practice questions
Courseiva writes every 350-401 question from scratch — 1,923 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
This 350-401 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-401 exam.