CV0-004 Stateful firewall Practice Question
A cloud engineer is tasked with securing network traffic in a VPC. Which TWO of the following are stateful security mechanisms? (Choose 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
✓
DDoS protection services
Security groups are stateful, automatically allowing return traffic. DDoS protection services are stateful as they track and analyze traffic flows to detect anomalies. Network ACLs are stateless. WAF is typically stateless, processing each request independently. Route tables are stateless, simply directing traffic without tracking connections.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Web Application Firewall (WAF)
Why it's wrong here
WAF is typically stateless, processing requests independently without tracking connection state.
- ✗
Network ACLs
Why it's wrong here
Network ACLs are stateless, requiring explicit rules for both inbound and outbound traffic.
- ✗
Route tables
Why it's wrong here
Route tables are stateless, making routing decisions based solely on destination IP without connection tracking.
- ✓
DDoS protection services
Why this is correct
DDoS protection services are stateful, monitoring traffic patterns and maintaining state to identify anomalies.
- ✓
Security groups
Why this is correct
Security groups are stateful, automatically allowing return traffic for established connections.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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