CRISC Risk Response and Mitigation Practice Question
This CRISC practice question tests your understanding of risk response and mitigation. 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.
Exhibit: Firewall rule configuration
```
access-list 100 permit tcp any any eq 80
access-list 100 permit tcp any any eq 443
access-list 100 permit tcp 10.0.0.0 0.255.255.255 any eq 22
access-list 100 deny ip any any
```
Refer to the exhibit. An organization uses this firewall access list. What is the MOST significant risk associated with this configuration?
Refer to the exhibit.
Exhibit: Firewall rule configuration
```
access-list 100 permit tcp any any eq 80
access-list 100 permit tcp any any eq 443
access-list 100 permit tcp 10.0.0.0 0.255.255.255 any eq 22
access-list 100 deny ip any any
```
A
The final rule denies all traffic
Why wrong: This is a standard security practice.
B
HTTPS traffic is permitted to any destination
Why wrong: HTTPS is necessary and encrypted.
C
SSH access is only allowed from internal network
Why wrong: This is a good control.
D
HTTP traffic is permitted from any source to any destination
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
HTTP traffic is permitted from any source to any destination
Option D is correct because the rule permit tcp any any eq 80 allows unrestricted HTTP access from any source, increasing exposure to web attacks. Option A is wrong because SSH is restricted to internal network. Option B is wrong because HTTPS is needed for web traffic. Option C is wrong because the deny all rule is proper.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CRISC NAT questions on configuration and troubleshooting.
Risk Response and Mitigation — This question tests Risk Response and Mitigation — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: HTTP traffic is permitted from any source to any destination — Option D is correct because the rule permit tcp any any eq 80 allows unrestricted HTTP access from any source, increasing exposure to web attacks. Option A is wrong because SSH is restricted to internal network. Option B is wrong because HTTPS is needed for web traffic. Option C is wrong because the deny all rule is proper.
What should I do if I get this CRISC question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CRISC NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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