This CV0-004 practice question tests your understanding of troubleshooting. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 is using a hybrid cloud model with an on-premises data center connected to a public cloud via a dedicated Direct Connect circuit. Users on the corporate network report that access to cloud resources is intermittently failing. The cloud administrator pings the cloud gateway and sees packet loss. The on-premises network team confirms no issues on their side. The administrator reviews the cloud provider's status page and finds no outages. What should the administrator do next?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Check the bandwidth utilization on the Direct Connect circuit
Option C is correct because intermittent packet loss and no provider outage suggest bandwidth saturation on the Direct Connect circuit. Option A is wrong because failing over to a VPN may not address the root cause and could mask it. Option B is wrong because rebooting the on-premises router is disruptive and doesn't troubleshoot bandwidth. Option D is wrong because a support ticket is unlikely to help if the provider has no issues and the circuit is simply congested.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Submit a support ticket to the cloud provider
Why it's wrong here
Provider reports no outage, so ticket would not diagnose on-premises utilization.
✗
Reboot the on-premises router
Why it's wrong here
Rebooting is a last resort and does not address bandwidth congestion.
✓
Check the bandwidth utilization on the Direct Connect circuit
Why this is correct
High utilization can cause packet loss and intermittent failures.
VPN failover does not diagnose or resolve bandwidth issues on the Direct Connect.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related CV0-004 subnetting questions on CIDR, address ranges, and subnet selection.
Troubleshooting — This question tests Troubleshooting — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Check the bandwidth utilization on the Direct Connect circuit — Option C is correct because intermittent packet loss and no provider outage suggest bandwidth saturation on the Direct Connect circuit. Option A is wrong because failing over to a VPN may not address the root cause and could mask it. Option B is wrong because rebooting the on-premises router is disruptive and doesn't troubleshoot bandwidth. Option D is wrong because a support ticket is unlikely to help if the provider has no issues and the circuit is simply congested.
What should I do if I get this CV0-004 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related CV0-004 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Question Discussion
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