Quick Answer
The answer is VPC Traffic Mirroring, which allows you to capture network packets from an EC2 instance without installing any software or agents. This service works by duplicating the network traffic at the hypervisor level and forwarding the full packet payloads to a monitoring appliance or storage destination, giving you complete visibility into the raw data flowing to and from the instance. On the AWS Certified Security Specialty SCS-C02 exam, this question tests your ability to distinguish between tools that provide deep packet inspection versus those that only offer metadata or filtering. A common trap is confusing VPC Flow Logs, which only capture IP header metadata (source, destination, ports, protocol) and not the actual packet contents, with Traffic Mirroring’s ability to capture the full payload. Another trap is assuming AWS Network Firewall can capture traffic, but it only filters and inspects packets inline without storing them for analysis. Remember the memory tip: “Mirror means copy the whole packet; Flow logs only show the envelope.”
This SCS-C02 practice question tests your understanding of security logging and monitoring. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 security engineer is investigating a potential security incident involving an EC2 instance. The engineer needs to capture network traffic to and from the instance for analysis. Which method should be used to capture this traffic without installing any software on the instance?
Enable VPC Flow Logs for the subnet.
Why wrong: Only captures metadata, not full packets.
Configure AWS Network Firewall in the VPC.
Why wrong: Used for filtering, not capturing full traffic.
Install the Amazon CloudWatch agent on the instance.
Why wrong: Does not capture network packets.
Use VPC Traffic Mirroring.
Captures full network packets without installing software.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use VPC Traffic Mirroring.
VPC Traffic Mirroring allows capturing network traffic from an EC2 instance without installing agents. Option D is correct. Option A is wrong because the agent must be installed on the instance. Option B is wrong because VPC Flow Logs only capture metadata, not the full packet payload. Option C is wrong because AWS Network Firewall does not capture traffic; it filters it.
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
For each option: why learners choose it and why it is or isn't the right answer here.
Enable VPC Flow Logs for the subnet.
Why it's wrong here
Only captures metadata, not full packets.
Configure AWS Network Firewall in the VPC.
Why it's wrong here
Used for filtering, not capturing full traffic.
Install the Amazon CloudWatch agent on the instance.
Why it's wrong here
Does not capture network packets.
Use VPC Traffic Mirroring.
Why this is correct
Captures full network packets without installing software.
Related concept
CIDR notation defines the prefix length.
Common exam traps
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
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.
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
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related SCS-C02 subnetting questions on CIDR, address ranges, and subnet selection.
Security Logging and Monitoring — study guide chapter
Learn the concepts, then practise the questions
Security Logging and Monitoring practice questions
Targeted practice on this topic area only
All SCS-C02 questions
1,738 questions across all exam domains
AWS Certified Security Specialty SCS-C02 study guide
Full concept coverage aligned to exam objectives
SCS-C02 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise SCS-C02 questions linked to Threat Detection and Incident Response.
Practise SCS-C02 questions linked to Security Logging and Monitoring.
Practise SCS-C02 questions linked to Identity and Access Management.
Practise SCS-C02 questions linked to Management and Security Governance.
Practise SCS-C02 questions linked to Infrastructure Security.
Practise SCS-C02 questions linked to Data Protection.
Practise SCS-C02 questions linked to SCS-C02 fundamentals.
Practise SCS-C02 questions linked to SCS-C02 scenario.
Practise SCS-C02 questions linked to SCS-C02 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Security Logging and Monitoring — This question tests Security Logging and Monitoring — CIDR notation defines the prefix length..
The correct answer is: Use VPC Traffic Mirroring. — VPC Traffic Mirroring allows capturing network traffic from an EC2 instance without installing agents. Option D is correct. Option A is wrong because the agent must be installed on the instance. Option B is wrong because VPC Flow Logs only capture metadata, not the full packet payload. Option C is wrong because AWS Network Firewall does not capture traffic; it filters it.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related SCS-C02 subnetting questions on CIDR, address ranges, and subnet selection.
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 →
Keep practising
Last reviewed: Jun 20, 2026
This SCS-C02 practice question is part of Courseiva's free Amazon Web Services 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 SCS-C02 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.