The answer is that the most significant security concern is the missing source IP restriction, allowing any source to match the access control list. This is a critical flaw because an ACL without a source IP filter permits traffic from any host or network, effectively negating the purpose of access control and exposing internal resources to potential attacks from untrusted or malicious sources. On the Cisco CyberOps Associate 200-201 exam, this concept tests your ability to identify misconfigurations that violate the principle of least privilege, often appearing in scenario-based questions where a deny any statement exists but the lack of a specific source IP creates a dangerous gap. A common trap is focusing on the presence of a deny any entry while overlooking that the permit statements lack source restrictions, which is the real vulnerability. Remember the mnemonic “No Source, No Security” to quickly recall that an ACL must always specify a source IP to enforce proper traffic filtering.
200-201 Security Policies and Procedures Practice Question
This 200-201 practice question tests your understanding of security policies and procedures. 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.
Exhibit
Refer to the exhibit.
access-list OUTSIDE extended permit tcp any host 192.168.1.100 eq www
access-list OUTSIDE extended permit tcp any host 192.168.1.100 eq https
access-list OUTSIDE extended deny ip any any
An analyst is reviewing this configuration. What is the most significant security concern?
Refer to the exhibit.
access-list OUTSIDE extended permit tcp any host 192.168.1.100 eq www
access-list OUTSIDE extended permit tcp any host 192.168.1.100 eq https
access-list OUTSIDE extended deny ip any any
A
The access-list permits all traffic to 192.168.1.100 on ports 80 and 443.
Why wrong: Intended functionality.
B
The access-list is missing a rule to deny all other traffic.
Why wrong: Deny any any is present.
C
The access-list only permits traffic to a single host.
Why wrong: Design choice, not a security flaw.
D
The access-list does not specify source IPs, allowing any source.
Best practice is to restrict source addresses.
E
The access-list should permit traffic to the entire subnet.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The access-list does not specify source IPs, allowing any source.
Option D is correct because allowing any source IP is a security risk; source restriction is missing. Option A is the purpose. Option B is present (deny any). Option C is a design choice. Option E is not recommended.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The access-list permits all traffic to 192.168.1.100 on ports 80 and 443.
Why it's wrong here
Intended functionality.
✗
The access-list is missing a rule to deny all other traffic.
Why it's wrong here
Deny any any is present.
✗
The access-list only permits traffic to a single host.
Why it's wrong here
Design choice, not a security flaw.
✓
The access-list does not specify source IPs, allowing any source.
The access-list should permit traffic to the entire subnet.
Why it's wrong here
Would widen exposure.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
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 block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related 200-201 subnetting questions on CIDR, address ranges, and subnet selection.
Security Policies and Procedures — This question tests Security Policies and Procedures — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: The access-list does not specify source IPs, allowing any source. — Option D is correct because allowing any source IP is a security risk; source restriction is missing. Option A is the purpose. Option B is present (deny any). Option C is a design choice. Option E is not recommended.
What should I do if I get this 200-201 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related 200-201 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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 200-201 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 200-201 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.