- A
The load balancer's frontend IP address has changed
Why wrong: IP address changes do not affect certificate renewal.
- B
The certificate has reached its maximum validity period
Why wrong: Google-managed certificates automatically renew; they do not have a fixed max period beyond renewal.
- C
The DNS CNAME record for domain validation is misconfigured or missing
Managed certificates require DNS records to prove domain ownership; incorrect records prevent renewal.
- D
The load balancer's SSL policy requires a minimum TLS version that the managed certificate does not support
Why wrong: Google-managed certificates support modern TLS versions; the SSL policy does not cause renewal failure.
Question 512 of 985
PCSE Configuring Network Security Practice Question
This PCSE practice question tests your understanding of configuring network security. 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.
An organization uses a global HTTPS load balancer with a Google-managed SSL certificate. The certificate was automatically provisioned and renewed. Recently, the certificate renewal failed and the site shows a warning. The load balancer's frontend uses the certificate. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
✓
The DNS CNAME record for domain validation is misconfigured or missing
Google-managed certificates are provisioned using DNS authorization. If the DNS records are misconfigured (e.g., the CNAME record for domain ownership validation is missing or incorrect), renewal will fail. The load balancer settings themselves are typically fine.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The load balancer's frontend IP address has changed
Why it's wrong here
IP address changes do not affect certificate renewal.
- ✗
The certificate has reached its maximum validity period
Why it's wrong here
Google-managed certificates automatically renew; they do not have a fixed max period beyond renewal.
- ✓
The DNS CNAME record for domain validation is misconfigured or missing
Why this is correct
Managed certificates require DNS records to prove domain ownership; incorrect records prevent renewal.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Authentication checks who the user is.
- ✗
The load balancer's SSL policy requires a minimum TLS version that the managed certificate does not support
Why it's wrong here
Google-managed certificates support modern TLS versions; the SSL policy does not cause renewal failure.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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 Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related PCSE questions on access control and AAA configuration.
- →
Configuring Network Security — study guide chapter
Learn the concepts, then practise the questions
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Configuring Network Security practice questions
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FAQ
Questions learners often ask
What does this PCSE question test?
Configuring Network Security — This question tests Configuring Network Security — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: The DNS CNAME record for domain validation is misconfigured or missing — Google-managed certificates are provisioned using DNS authorization. If the DNS records are misconfigured (e.g., the CNAME record for domain ownership validation is missing or incorrect), renewal will fail. The load balancer settings themselves are typically fine.
What should I do if I get this PCSE question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related PCSE questions on access control and AAA configuration.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Authentication checks who the user is.
About these practice questions
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Last reviewed: Jul 4, 2026
This PCSE 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 PCSE exam.
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