CCSP Cloud Platform and Infrastructure Security Practice Question
This CCSP practice question tests your understanding of cloud platform and infrastructure security. 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.
Resources:
WebSecurityGroup:
Type: AWS::EC2::SecurityGroup
Properties:
GroupDescription: Web server security group
SecurityGroupIngress:
- IpProtocol: tcp
FromPort: 443
ToPort: 443
CidrIp: 0.0.0.0/0
Refer to the exhibit. A CloudFormation template defines a security group as shown. What is the security concern with this configuration?
Refer to the exhibit.
Resources:
WebSecurityGroup:
Type: AWS::EC2::SecurityGroup
Properties:
GroupDescription: Web server security group
SecurityGroupIngress:
- IpProtocol: tcp
FromPort: 443
ToPort: 443
CidrIp: 0.0.0.0/0
A
It allows SSH access on port 22.
Why wrong: No SSH rule is defined.
B
It allows HTTP traffic on port 80, not HTTPS.
Why wrong: The rule is for port 443, which is HTTPS.
C
It does not allow outbound traffic.
Why wrong: Security groups are stateful; outbound is allowed by default.
D
It allows inbound traffic from all IP addresses on port 443, which is overly permissive.
Best practice is to restrict source IPs to known ranges.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It allows inbound traffic from all IP addresses on port 443, which is overly permissive.
Option D is correct because the security group rule allows inbound traffic on port 443 (HTTPS) from 0.0.0.0/0, which means any IP address on the internet can reach the resource. This is overly permissive and violates the principle of least privilege, as it exposes the service to potential attacks from any source without restriction.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
Security groups are stateful; outbound is allowed by default.
✓
It allows inbound traffic from all IP addresses on port 443, which is overly permissive.
Why this is correct
Best practice is to restrict source IPs to known ranges.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISC2 often tests the misconception that allowing a common protocol like HTTPS on port 443 is always safe, but the trap is that the source IP range (0.0.0.0/0) is the actual vulnerability, not the port or protocol itself.
Detailed technical explanation
How to think about this question
In AWS CloudFormation, security group rules are stateful, so allowing inbound HTTPS traffic automatically permits the outbound response, but the rule shown uses 0.0.0.0/0 as the source, which opens the resource to the entire internet. A best practice is to restrict the source CIDR to specific trusted IP ranges (e.g., your corporate VPN) or use security group references for granular control. In a real-world scenario, this misconfiguration could lead to unauthorized access or DDoS attacks on the HTTPS endpoint.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A security analyst at a medium-sized enterprise encounters this scenario during an investigation or architecture review. The correct answer reflects best practice for the specific threat or control described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Security exam questions test whether you can match controls to threats in context — not just recall definitions.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Cloud Platform and Infrastructure Security — This question tests Cloud Platform and Infrastructure Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: It allows inbound traffic from all IP addresses on port 443, which is overly permissive. — Option D is correct because the security group rule allows inbound traffic on port 443 (HTTPS) from 0.0.0.0/0, which means any IP address on the internet can reach the resource. This is overly permissive and violates the principle of least privilege, as it exposes the service to potential attacks from any source without restriction.
What should I do if I get this CCSP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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