- A
Inbound on the outside interface
Correct. Traffic from lower to higher security level requires an ACL inbound on the lower security interface.
- B
Outbound on the DMZ interface
Why wrong: Outbound on DMZ would filter traffic leaving DMZ.
- C
Outbound on the outside interface
Why wrong: Outbound ACL on outside would affect traffic leaving outside, not entering.
- D
Inbound on the DMZ interface
Why wrong: Inbound on DMZ would filter traffic entering DMZ from inside, not from outside.
Question 737 of 988
350-701 Network Security Practice Question
This 350-701 practice question tests your understanding of network security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
An engineer needs to allow inbound HTTP traffic from the internet to a web server in the DMZ on a Cisco ASA. The DMZ interface security level is 50, and the outside interface is 0. Which interface direction should the access control entry be applied?
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
✓
Inbound on the outside interface
Traffic from outside (level 0) to DMZ (level 50) is inbound to the DMZ interface, so the ACL should be applied inbound on the outside interface or outbound on the DMZ interface; the standard approach is inbound on the lower security interface.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Inbound on the outside interface
Why this is correct
Correct. Traffic from lower to higher security level requires an ACL inbound on the lower security interface.
Related concept
Standard ACLs match source addresses.
- ✗
Outbound on the DMZ interface
Why it's wrong here
Outbound on DMZ would filter traffic leaving DMZ.
- ✗
Outbound on the outside interface
Why it's wrong here
Outbound ACL on outside would affect traffic leaving outside, not entering.
- ✗
Inbound on the DMZ interface
Why it's wrong here
Inbound on DMZ would filter traffic entering DMZ from inside, not from outside.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related 350-701 ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this 350-701 question test?
Network Security — This question tests Network Security — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Inbound on the outside interface — Traffic from outside (level 0) to DMZ (level 50) is inbound to the DMZ interface, so the ACL should be applied inbound on the outside interface or outbound on the DMZ interface; the standard approach is inbound on the lower security interface.
What should I do if I get this 350-701 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related 350-701 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jul 4, 2026
This 350-701 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 350-701 exam.
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