AWS CLF-C02 Practice Question
What is a security group in an Amazon VPC
Question
What is a security group in an Amazon VPC?
AA physical firewall at the data center
BA stateful virtual firewall that controls inbound and outbound traffic using allow-only rules ✓
CAn encryption service for network traffic
DA service for blocking DDoS attacks
Correct Answer: B
A stateful virtual firewall that controls inbound and outbound traffic using allow-only rules
Why this is the right answer
Explanation: Security groups act as stateful virtual firewalls at the instance/resource level. They allow only the traffic you explicitly permit.
📌 Exam tip: In Security questions, read the "who does what" clues carefully. If the scenario mentions your company managing something, the answer points to the CUSTOMER side of the shared responsibility model; if AWS handles it transparently, it is AWS's responsibility.
Every AWS Cloud Practitioner question on this site comes from the four official CLF-C02 exam domains. Practice the full domain set in our free timed mock exam and review every topic in the CLF-C02 study guide.
Try this question in the interactive practice test
Start free in seconds — no signup, no credit card. Practice questions, timed mock exams with the official 70% pass threshold, and flashcards.
Related
More Security & Compliance questions
16Under the shared responsibility model, who is responsible for patching the guest operating system of an EC2 instance?17Which AWS service is used to create and manage the encryption keys that protect your data at rest?18Which service records API activity in your AWS account for auditing and governance?19Which service continuously monitors your AWS environment for malicious or unauthorized behavior?20Which AWS service provides a web application firewall to protect applications from common web exploits such as SQL injection?