Question 1hardmulti select
Full question →hardmulti selectObjective-mapped
A router interface connects the DMZ subnet 10.10.10.0/24 to the internal network. A web server at 10.10.10.25 must reach an application server at 10.10.20.20 on TCP 8443, and all other DMZ-to-internal traffic must be blocked. Which two ACL entries should be applied inbound on the DMZ-facing interface? Select two.
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
permit tcp 10.10.10.25 host 10.10.20.20 eq 8443
This rule allows only the required web-server-to-application-server connection on the specified port. It uses a very narrow source and destination definition, which is the safest way to permit the business flow. The ACL should allow the needed application traffic and nothing broader than that.
B
Distractor review
permit tcp host 10.10.20.20 any eq 8443
This rule is written in the wrong direction and is far too broad. It permits traffic sourced from the application server to any destination, which does not match the required flow. ACLs must be precise about source, destination, and direction.
C
Best answer
deny ip 10.10.10.0/24 10.10.20.0/24
This rule blocks all remaining DMZ-originated traffic toward the internal subnet after the specific permit has been evaluated. That matches the stated requirement to stop any other DMZ-to-internal communication. Using a deny rule after the allowed exception is a standard way to enforce default deny.
D
Distractor review
permit ip any any
This would allow all traffic through the interface and completely defeat the purpose of the segmentation boundary. A rule like this is useful only when the goal is unrestricted access, which is the opposite of the scenario. Default deny should remain in place for all other flows.
E
Distractor review
permit udp 10.10.10.0/24 host 10.10.20.20 eq 8443
The application requires TCP, not UDP, so this rule would not allow the intended service to function. It also uses a broad subnet rather than the specific web host. Protocol and addressing must match the actual application flow.
Common exam trap
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.
Technical deep dive
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.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
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Question 2
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Question 3
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Question 4
You are handed a company laptop suspected in an insider theft case. Legal says the evidence may be needed in court. Which action best preserves admissibility?
Question 5
A developer wants to reduce the risk of SQL injection in a new customer search form. Which two changes are the best mitigations? Select two.
Question 6
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FAQ
Questions learners often ask
What does this SY0-701 question test?
Authentication checks who the user is.
What is the correct answer to this question?
The correct answer is: permit tcp 10.10.10.25 host 10.10.20.20 eq 8443 — The ACL should permit only the exact traffic needed for the web-to-app connection and deny the rest. The specific permit statement lets the designated DMZ web server talk to the application server on TCP 8443. The deny statement blocks all remaining DMZ-to-internal traffic, which is necessary because the requirement is not broad internal access but only one controlled flow. That combination supports least privilege at the network boundary. Why others are wrong: The wrong options either point in the wrong direction, use the wrong protocol, or permit everything. Those mistakes would either break the application or eliminate the protection entirely. A secure ACL must be narrow, accurate, and aligned to the required traffic path.
What should I do if I get this SY0-701 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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