- A
Enter global configuration mode, create the extended ACL with the deny statement for Telnet from the specific host to the server subnet, then permit other traffic.
This step correctly describes creating the ACL in global configuration mode, which is the first step after entering config mode. The ACL must be created before it can be applied to an interface.
- B
Apply the ACL to the inbound direction of the interface closest to the source host.
This is incorrect because applying the ACL should come after creating it, not before. The order is: create, then apply.
- C
Save the running configuration to startup configuration using 'copy running-config startup-config'.
This is incorrect because saving should be done after applying and verifying the ACL, not before verification. Verification ensures the ACL works correctly before making it permanent.
- D
Verify the ACL configuration using 'show access-lists' and test Telnet access from the host.
This is incorrect because verification should occur after applying the ACL, not before. The ACL must be applied to an interface to be active and testable.
CCNA Network Services and Security Practice Question
This 200-301 practice question tests your understanding of network services and security. 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.
Drag and drop the following steps into the correct order to plan, configure, and apply an extended ACL that denies Telnet from a specific host to a server subnet, then verify the configuration.
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, create the extended ACL with the deny statement for Telnet from the specific host to the server subnet, then permit other traffic.
The correct sequence is: create the ACL (A), apply it to the interface (B), verify it works (D), then save the configuration (C). This prevents saving a faulty ACL. Verifying after saving (C before D) risks persisting errors and is not the Cisco recommended workflow.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enter global configuration mode, create the extended ACL with the deny statement for Telnet from the specific host to the server subnet, then permit other traffic.
Why this is correct
This step correctly describes creating the ACL in global configuration mode, which is the first step after entering config mode. The ACL must be created before it can be applied to an interface.
Related concept
Authentication checks who the user is.
- ✓
Apply the ACL to the inbound direction of the interface closest to the source host.
Why this is correct
This is incorrect because applying the ACL should come after creating it, not before. The order is: create, then apply.
Related concept
Authentication checks who the user is.
- ✓
Save the running configuration to startup configuration using 'copy running-config startup-config'.
Why this is correct
This is incorrect because saving should be done after applying and verifying the ACL, not before verification. Verification ensures the ACL works correctly before making it permanent.
Related concept
Authentication checks who the user is.
- ✓
Verify the ACL configuration using 'show access-lists' and test Telnet access from the host.
Why this is correct
This is incorrect because verification should occur after applying the ACL, not before. The ACL must be applied to an interface to be active and testable.
Related concept
Authentication checks who the user is.
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 security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
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 Services and Security — This question tests Network Services and Security — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Enter global configuration mode, create the extended ACL with the deny statement for Telnet from the specific host to the server subnet, then permit other traffic. — The correct sequence is: create the ACL (A), apply it to the interface (B), verify it works (D), then save the configuration (C). This prevents saving a faulty ACL. Verifying after saving (C before D) risks persisting errors and is not the Cisco recommended workflow.
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 6, 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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