200-901 Application Deployment and Security Practice Question
This 200-901 practice question tests your understanding of application deployment and 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.
Exhibit
ip access-list extended APP-SECURITY
deny tcp any any eq 8080
permit tcp 192.168.1.0 0.0.0.255 any eq 8080
permit udp any any eq 53
Refer to the exhibit. An application is deployed on a server at 192.168.1.10, listening on TCP port 8080. The ACL is applied inbound on the server's network interface. Which clients will be able to access the application?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
No clients, because the deny statement blocks all TCP traffic to port 8080
The ACL processes rules in order. The first rule denies all TCP traffic to port 8080 from any source, so even traffic from 192.168.1.0/24 is blocked. The second permit rule is never reached for TCP 8080. Therefore, no clients can access the application on port 8080.
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.
✗
Clients from any network, because the permit statement overrides the deny
Why it's wrong here
In an access list, order matters; the deny rule is applied before the permit rule for the same traffic type.
✗
Only clients from the 192.168.1.0/24 network
Why it's wrong here
The deny rule precedes the permit rule, so all TCP traffic to port 8080 is blocked regardless of source.
✓
No clients, because the deny statement blocks all TCP traffic to port 8080
Why this is correct
The first rule denies all TCP traffic to port 8080, making the subsequent permit ineffective for TCP.
Related concept
Standard ACLs match source addresses.
✗
Only clients sending UDP traffic to port 53
Why it's wrong here
UDP port 53 is permitted, but the application listens on TCP 8080, so this is irrelevant.
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.
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 200-901 ACL questions on filtering logic and placement.
Application Deployment and Security — This question tests Application Deployment and Security — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: No clients, because the deny statement blocks all TCP traffic to port 8080 — The ACL processes rules in order. The first rule denies all TCP traffic to port 8080 from any source, so even traffic from 192.168.1.0/24 is blocked. The second permit rule is never reached for TCP 8080. Therefore, no clients can access the application on port 8080.
What should I do if I get this 200-901 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 200-901 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This 200-901 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 200-901 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.