- A
Inbound DNS policy
An inbound DNS policy allows on-premises DNS servers to forward queries to Cloud DNS.
- B
Outbound DNS policy
Why wrong: Outbound DNS policy is for VMs to forward queries to on-premises DNS.
- C
Cloud NAT
Why wrong: Cloud NAT provides outbound internet access, not DNS resolution.
- D
Private Google Access
Why wrong: Private Google Access enables VMs to reach Google APIs without external IPs.
Question 882 of 1,000
easyMultiple ChoiceObjective-mapped
PCNE Practice Question: A company has a Cloud VPN tunnel to on-premises
This PCNE practice question tests your understanding of a company has a cloud vpn tunnel to on-premises. 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 company has a Cloud VPN tunnel to on-premises. They want on-premises clients to resolve private DNS names in the VPC. Which service should they configure?
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
✓
Inbound DNS policy
Option A is correct: An inbound DNS policy forwards DNS queries from on-premises DNS servers to Cloud DNS, enabling resolution of private zone names. Option B (Outbound DNS policy) is for forwarding queries from VMs to on-premises DNS, the opposite direction. Option C (Cloud NAT) provides outbound internet access for VMs, not DNS resolution. Option D (Private Google Access) allows VMs with internal IPs to reach Google APIs, not on-premises DNS resolution.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Visual reference
Quick reference
Common DNS Record Types
| Record | Purpose | Example |
|---|---|---|
| A | IPv4 address mapping | example.com → 93.184.216.34 |
| AAAA | IPv6 address mapping | example.com → 2606:2800::1 |
| CNAME | Alias to another hostname | www → example.com |
| MX | Mail server for domain | example.com → mail.example.com (priority 10) |
| TXT | Text data (SPF, DKIM, verification) | v=spf1 include:_spf.example.com ~all |
| NS | Authoritative name servers | example.com NS ns1.example.com |
| PTR | Reverse DNS (IP → hostname) | 34.216.184.93.in-addr.arpa → example.com |
| SOA | Zone authority record | Primary NS, admin email, serial, TTL defaults |
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PCNE NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this PCNE question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Inbound DNS policy — Option A is correct: An inbound DNS policy forwards DNS queries from on-premises DNS servers to Cloud DNS, enabling resolution of private zone names. Option B (Outbound DNS policy) is for forwarding queries from VMs to on-premises DNS, the opposite direction. Option C (Cloud NAT) provides outbound internet access for VMs, not DNS resolution. Option D (Private Google Access) allows VMs with internal IPs to reach Google APIs, not on-premises DNS resolution.
What should I do if I get this PCNE question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related PCNE NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 24, 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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