The correct answer is that a client closed the HTTPS connection and the host is in TIME_WAIT state. This is because TIME_WAIT is a standard TCP state that occurs when the side that initiated the connection closure—typically the client—sends a FIN packet, and the server (the ESXi host) acknowledges it, then waits to ensure any delayed packets are not misinterpreted by a new connection. On the VCP-DCV exam, this concept tests your understanding of TCP/IP fundamentals as they apply to ESXi host networking, often appearing in troubleshooting scenarios where an administrator sees many TIME_WAIT connections and must distinguish normal behavior from a problem. A common trap is assuming TIME_WAIT indicates a bottleneck or attack, but it is actually a safe, expected state that prevents data corruption. For a memory tip, think of TIME_WAIT as the host’s “cleanup crew”—it hangs around just long enough to make sure no stray packets from the old connection mess up a new one.
VCP-DCV vSphere Performance and Scaling Practice Question
This VCP-DCV practice question tests your understanding of vsphere performance and scaling. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Exhibit
Refer to the exhibit.
esxcli network ip connection list | grep 443
tcp 0 0 192.168.10.10:443 192.168.10.20:54321 ESTABLISHED 131230
tcp 0 0 192.168.10.10:443 192.168.10.21:54322 ESTABLISHED 131231
tcp 0 0 192.168.10.10:443 192.168.10.22:54323 TIME_WAIT 0
tcp 0 0 192.168.10.10:443 192.168.10.23:54324 ESTABLISHED 131232
Refer to the exhibit. An administrator runs the command on an ESXi host to check HTTPS connections. The host is running vCenter Server and several VMs. What is the most likely cause of the TIME_WAIT connection?
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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A client closed the HTTPS connection and the host is in TIME_WAIT state.
Option D is correct because the TIME_WAIT state is a normal part of TCP connection termination. When a client closes an HTTPS connection, the ESXi host (as the server) enters TIME_WAIT to ensure any delayed segments are not misinterpreted by a new connection. This state is expected and not indicative of a problem.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
A firewall is blocking return traffic from that client.
Why it's wrong here
Blocking would not result in TIME_WAIT; the host would not see the connection.
✗
The host's TCP stack is misconfigured for high traffic.
The host is under memory pressure and dropping connections.
Why it's wrong here
Memory pressure would not show as TIME_WAIT.
✓
A client closed the HTTPS connection and the host is in TIME_WAIT state.
Why this is correct
TIME_WAIT is normal after a client disconnects.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often associate TIME_WAIT with a network or host problem, when in fact it is a standard TCP state indicating a clean connection closure initiated by the remote client.
Trap categories for this question
Command / output trap
Memory pressure would not show as TIME_WAIT.
Detailed technical explanation
How to think about this question
TIME_WAIT is defined in RFC 793 and lasts 2*MSL (typically 60 seconds on Linux/ESXi) to handle delayed duplicate segments. On an ESXi host running vCenter Server, HTTPS connections from vSphere clients or APIs will frequently cycle through TIME_WAIT as sessions are closed. This is normal behavior and does not require tuning unless thousands of such sockets accumulate, which could exhaust ephemeral ports.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
vSphere Performance and Scaling — This question tests vSphere Performance and Scaling — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A client closed the HTTPS connection and the host is in TIME_WAIT state. — Option D is correct because the TIME_WAIT state is a normal part of TCP connection termination. When a client closes an HTTPS connection, the ESXi host (as the server) enters TIME_WAIT to ensure any delayed segments are not misinterpreted by a new connection. This state is expected and not indicative of a problem.
What should I do if I get this VCP-DCV question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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?
Read the scenario before looking for a memorised answer.
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