- A
AWS PrivateLink
Why wrong: PrivateLink provides private connectivity to services.
- B
Security Groups
Security groups are stateful instance-level firewalls.
- C
AWS WAF
Why wrong: AWS WAF protects web applications from common exploits at the application layer.
- D
AWS Shield
Why wrong: Shield provides DDoS protection, not traffic filtering.
- E
Network ACLs (NACLs)
NACLs are stateless subnet-level firewalls.
Question 170 of 988
350-701 Cloud Security Practice Question
This 350-701 practice question tests your understanding of cloud 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.
A cloud engineer is deploying a web application on AWS and needs to control inbound and outbound traffic at both the instance and subnet levels. Which two AWS security controls should they configure? (Select two.)
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
✓
Security Groups
Security groups act as instance-level firewalls, and NACLs provide stateless subnet-level filtering.
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.
- ✗
AWS PrivateLink
Why it's wrong here
PrivateLink provides private connectivity to services.
- ✓
Security Groups
Why this is correct
Security groups are stateful instance-level firewalls.
Related concept
CIDR notation defines the prefix length.
- ✗
AWS WAF
Why it's wrong here
AWS WAF protects web applications from common exploits at the application layer.
- ✗
AWS Shield
Why it's wrong here
Shield provides DDoS protection, not traffic filtering.
- ✓
Network ACLs (NACLs)
Why this is correct
NACLs are stateless subnet-level firewalls.
Related concept
CIDR notation defines the prefix length.
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.
Visual reference
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 350-701 subnetting questions on CIDR, address ranges, and subnet selection.
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FAQ
Questions learners often ask
What does this 350-701 question test?
Cloud Security — This question tests Cloud Security — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Security Groups — Security groups act as instance-level firewalls, and NACLs provide stateless subnet-level filtering.
What should I do if I get this 350-701 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 350-701 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Last reviewed: Jul 4, 2026
This 350-701 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 350-701 exam.
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