Quick Answer
The correct answer is to enable the interface. The 'no shutdown' command in Cisco IOS reverses the default administrative state of a router interface, which is typically placed in a "shutdown" or administratively down condition to prevent accidental traffic flow during initial configuration. By issuing this command, you change the interface state from "administratively down" to an operational "up/up" status, allowing it to send and receive network traffic. On the CompTIA ITF+ FC0-U61 exam, this concept tests your understanding of basic network device configuration, often appearing in scenario-based questions where a newly configured interface fails to pass traffic. A common trap is confusing "shutdown" with a physical cable issue—remember that 'no shutdown' is purely a software toggle, not a fix for disconnected cables. A helpful memory tip is to think of the command as "no, do not shut down," meaning you are telling the interface to stay active and operational.
This FC0-U61 practice question tests your understanding of it concepts and terminology. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
interface FastEthernet0/0 ip address 192.168.1.1 255.255.255.0 no shutdown
Refer to the exhibit. What is the purpose of the 'no shutdown' command in this router configuration?
interface FastEthernet0/0 ip address 192.168.1.1 255.255.255.0 no shutdown
Remove the IP address
Why wrong: The IP address is set separately.
Reset the interface configuration
Why wrong: No such function.
Disable the interface
Why wrong: 'Shutdown' disables the interface.
Enable the interface
'No shutdown' activates the interface.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Enable the interface
The 'no shutdown' command is used in Cisco IOS to administratively bring an interface from the 'administratively down' state to an operational 'up/up' state. By default, many router interfaces are placed in a shutdown state upon initial configuration, and issuing 'no shutdown' enables the interface to send and receive traffic.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Remove the IP address
Why it's wrong here
The IP address is set separately.
Reset the interface configuration
Why it's wrong here
No such function.
Disable the interface
Why it's wrong here
'Shutdown' disables the interface.
Enable the interface
Why this is correct
'No shutdown' activates the interface.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
CompTIA often tests the misconception that 'no shutdown' is used to remove a configuration or reset an interface, when in fact it specifically toggles the administrative state from disabled to enabled.
Detailed technical explanation
The 'shutdown' and 'no shutdown' commands manipulate the administrative state of an interface at the device driver level, setting a software flag that prevents the interface from passing traffic even if the physical layer is up. In a real-world scenario, after configuring an interface with an IP address and other parameters, an engineer must issue 'no shutdown' to make the interface operational; otherwise, the interface remains in a 'down/down' or 'administratively down' state, and protocols like OSPF or EIGRP will not form adjacencies over it.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the FC0-U61 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
IT Concepts and Terminology — This question tests IT Concepts and Terminology — Read the scenario before looking for a memorised answer..
The correct answer is: Enable the interface — The 'no shutdown' command is used in Cisco IOS to administratively bring an interface from the 'administratively down' state to an operational 'up/up' state. By default, many router interfaces are placed in a shutdown state upon initial configuration, and issuing 'no shutdown' enables the interface to send and receive traffic.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This FC0-U61 practice question is part of Courseiva's free CompTIA 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 FC0-U61 exam.
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