- A
HTTP traffic from 10.1.1.1 to 192.168.1.100 is permitted, but all other HTTP traffic to that host is denied.
The first entry permits HTTP from 10.1.1.1 to 192.168.1.100, and the second denies all other HTTP to that host. The third entry permits all other traffic, but it does not override the deny for HTTP because ACLs are processed top-down until a match is found.
- B
All HTTP traffic to 192.168.1.100 is denied.
Why wrong: The first entry permits HTTP from 10.1.1.1, so not all HTTP is denied.
- C
All traffic from 10.1.1.1 to 192.168.1.100 is permitted.
Why wrong: Only HTTP (port 80) is permitted; other traffic from 10.1.1.1 to 192.168.1.100 would match the final permit, but the ACL does not specifically permit all traffic from that source.
- D
The ACL is applied inbound on an interface.
Why wrong: The output does not indicate the direction or interface where the ACL is applied.
CCNP ACLs and CoPP Practice Question
This 350-401 practice question tests your understanding of acls and copp. 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.
A network engineer runs the following command on Router R1:
R1# show access-lists
Extended IP access list 101
10 permit tcp host 10.1.1.1 host 192.168.1.100 eq 80 (4 matches)
20 deny tcp any host 192.168.1.100 eq 80 (12 matches)
30 permit ip any any (8 matches)Based on this output, what can be concluded?
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
HTTP traffic from 10.1.1.1 to 192.168.1.100 is permitted, but all other HTTP traffic to that host is denied.
ACL 101 has three entries. The first permits HTTP from a specific host, the second denies HTTP from any source to that host, and the third permits all other IP traffic. The match counts show that 4 packets matched the permit, 12 matched the deny, and 8 matched the final permit. The correct answer is that HTTP traffic from 10.1.1.1 to 192.168.1.100 is permitted, but all other HTTP traffic to that host is denied.
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.
- ✓
HTTP traffic from 10.1.1.1 to 192.168.1.100 is permitted, but all other HTTP traffic to that host is denied.
Why this is correct
The first entry permits HTTP from 10.1.1.1 to 192.168.1.100, and the second denies all other HTTP to that host. The third entry permits all other traffic, but it does not override the deny for HTTP because ACLs are processed top-down until a match is found.
Related concept
Standard ACLs match source addresses.
- ✗
All HTTP traffic to 192.168.1.100 is denied.
Why it's wrong here
The first entry permits HTTP from 10.1.1.1, so not all HTTP is denied.
- ✗
All traffic from 10.1.1.1 to 192.168.1.100 is permitted.
- ✗
The ACL is applied inbound on an interface.
Why it's wrong here
The output does not indicate the direction or interface where the ACL is applied.
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.
Trap categories for this question
Command / output trap
The output does not indicate the direction or interface where the ACL is applied.
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.
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 350-401 ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this 350-401 question test?
ACLs and CoPP — This question tests ACLs and CoPP — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: HTTP traffic from 10.1.1.1 to 192.168.1.100 is permitted, but all other HTTP traffic to that host is denied. — ACL 101 has three entries. The first permits HTTP from a specific host, the second denies HTTP from any source to that host, and the third permits all other IP traffic. The match counts show that 4 packets matched the permit, 12 matched the deny, and 8 matched the final permit. The correct answer is that HTTP traffic from 10.1.1.1 to 192.168.1.100 is permitted, but all other HTTP traffic to that host is denied.
What should I do if I get this 350-401 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 350-401 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: Jun 18, 2026
This 350-401 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 350-401 exam.
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