- A
Source: The IP address or range from which traffic originates.
Source specifies the originating IP addresses or CIDR ranges for the traffic.
- B
Destination: The IP address or range to which traffic is intended.
Destination specifies the target IP addresses or CIDR ranges for the traffic.
- C
Action: Whether the rule allows or denies traffic.
Action determines if matching traffic is permitted or blocked.
- D
Direction: Whether the rule applies to incoming (ingress) or outgoing (egress) traffic.
Direction indicates if the rule governs inbound or outbound traffic.
- E
Priority: The IP address range from which traffic originates.
Why wrong: Incorrect — Priority is an integer that determines rule evaluation order, not an IP range.
- F
Protocol: Whether the rule allows or denies traffic.
Why wrong: Incorrect — Protocol specifies the network protocol (e.g., TCP, UDP), not the action.
PCNE Practice Question: Match each VPC firewall rule component to its…
This PCNE practice question tests your understanding of pcne exam topics. 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.
Match each VPC firewall rule component to its description.
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
Source: The IP address or range from which traffic originates.
Correct matches: Source refers to originating IPs, Destination to target IPs, Action to allow/deny, Direction to ingress/egress. Priority and Protocol are other components with distinct meanings.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Source: The IP address or range from which traffic originates.
Why this is correct
Source specifies the originating IP addresses or CIDR ranges for the traffic.
Related concept
Standard ACLs match source addresses.
- ✓
Destination: The IP address or range to which traffic is intended.
Why this is correct
Destination specifies the target IP addresses or CIDR ranges for the traffic.
Related concept
Standard ACLs match source addresses.
- ✓
Action: Whether the rule allows or denies traffic.
Why this is correct
Action determines if matching traffic is permitted or blocked.
Related concept
Standard ACLs match source addresses.
- ✓
Direction: Whether the rule applies to incoming (ingress) or outgoing (egress) traffic.
Why this is correct
Direction indicates if the rule governs inbound or outbound traffic.
Related concept
Standard ACLs match source addresses.
- ✗
Priority: The IP address range from which traffic originates.
Why it's wrong here
Incorrect — Priority is an integer that determines rule evaluation order, not an IP range.
- ✗
Protocol: Whether the rule allows or denies traffic.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PCNE ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this PCNE question test?
Standard ACLs match source addresses.
What is the correct answer to this question?
The correct answer is: Source: The IP address or range from which traffic originates. — Correct matches: Source refers to originating IPs, Destination to target IPs, Action to allow/deny, Direction to ingress/egress. Priority and Protocol are other components with distinct meanings.
What should I do if I get this PCNE question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related PCNE ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jun 11, 2026
This PCNE practice question is part of Courseiva's free Google Cloud 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 PCNE exam.
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