Question 1mediumdrag order
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Quick Answer
The correct order is to first enter global configuration mode, then enable the command `service unsupported-transceiver`, configure the interface, and finally verify with `show interfaces transceiver GigabitEthernet0/1 detail`. This sequence is correct because Cisco switches, by default, reject third-party SFP transceivers to ensure hardware reliability and support compliance; the `service unsupported-transceiver` command explicitly overrides this restriction, allowing the switch to initialize the transceiver. On the CCNA 200-301 v2 exam, this appears as a drag-and-drop task testing your ability to recall the exact command syntax and logical order—a common trap is placing the verification step before enabling the unsupported-transceiver feature, which would cause the switch to ignore the transceiver entirely. Remember the mnemonic "ESC-V": Enable, Service, Configure, Verify—think of hitting the ESC key to bypass the lock, then checking the Vitals.
CCNA Network Infrastructure and Connectivity Practice Question
This 200-301 practice question tests your understanding of network infrastructure and connectivity. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
Drag and drop the following steps into the correct order to enable a third-party SFP transceiver and verify its diagnostics on a Cisco switch.
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
✓
Enter global configuration mode: configure terminal
Cisco switches by default only support Cisco-branded SFP transceivers. To use a third-party transceiver, the command `service unsupported-transceiver` must be enabled in global configuration mode. After configuring the interface, the `show interfaces transceiver` command displays diagnostic information including temperature, voltage, and optical power, which helps verify proper operation.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A practitioner preparing for the 200-301 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. Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 200-301 questions on access control and AAA configuration.
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FAQ
Questions learners often ask
What does this 200-301 question test?
Network Infrastructure and Connectivity — This question tests Network Infrastructure and Connectivity — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Enter global configuration mode: configure terminal — Cisco switches by default only support Cisco-branded SFP transceivers. To use a third-party transceiver, the command `service unsupported-transceiver` must be enabled in global configuration mode. After configuring the interface, the `show interfaces transceiver` command displays diagnostic information including temperature, voltage, and optical power, which helps verify proper operation.
What should I do if I get this 200-301 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 200-301 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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Last reviewed: Jun 14, 2026
This 200-301 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 200-301 exam.
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