The answer is that ICMP traffic is blocked by the ESXi firewall. SSH works because it uses TCP port 22, which is allowed by default, while ping relies on ICMP echo requests, which the ESXi host firewall blocks by default to reduce attack surface. This distinction is critical for the VMware Certified Professional Data Center Virtualization VCP-DCV exam, where a common trap is assuming network reachability based on one protocol—if SSH succeeds but ping fails, the firewall is the culprit, not a routing or service issue. On the exam, remember that ESXi treats ICMP as a separate, restricted protocol even when management services like SSH are fully open. A helpful memory tip: “SSH is TCP, ping is ICMP—if one works and the other doesn’t, check the firewall rules first.”
VCP-DCV Configure and Manage vSphere Networking Practice Question
This VCP-DCV practice question tests your understanding of configure and manage vsphere networking. 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.
Exhibit
Refer to the exhibit.
# esxcli network ip connection list | grep -E "10.10.10.1|10.10.10.2"
tcp 0 0 10.10.10.1:22 10.10.10.2:45678 ESTABLISHED new-session
udp 0 0 10.10.10.1:123 0.0.0.0:*
# esxcli network ip route ipv4 list
Network Netmask Gateway Interface
0.0.0.0 0.0.0.0 10.10.10.254 vmk0
10.10.10.0 255.255.255.0 0.0.0.0 vmk0
169.254.0.0 255.255.0.0 0.0.0.0 vmk1
An administrator is troubleshooting SSH connectivity to an ESXi host from a management workstation at 10.10.10.2. The SSH session is established, but the administrator cannot ping the host's IP 10.10.10.1. Based on the exhibit, 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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
ICMP traffic is blocked by the ESXi firewall.
The administrator can establish an SSH session, which proves that the ESXi host's SSH service is running and that TCP port 22 is reachable from the management workstation. However, the inability to ping the host's IP address (10.10.10.1) indicates that ICMP echo requests are being blocked. By default, the ESXi firewall blocks ICMP traffic, so the most likely cause is that ICMP is filtered by the host firewall.
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.
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume SSH connectivity implies full network reachability, but the ESXi firewall selectively permits services, so a successful SSH session does not guarantee that ICMP or other protocols are allowed.
Trap categories for this question
Command / output trap
Route shows default gateway.
Detailed technical explanation
How to think about this question
The ESXi firewall is a stateful, rule-based firewall that controls traffic to and from the host. By default, the firewall allows SSH (TCP 22) but blocks ICMP (ping) unless explicitly enabled via the vSphere Client or the esxcli network firewall ruleset set command. This is a common security hardening measure to reduce the attack surface, as ICMP can be used for reconnaissance. Administrators can verify the firewall status with `esxcli network firewall ruleset list` and enable ICMP with `esxcli network firewall ruleset set --ruleset-id=icmp --enabled=true`.
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 help-desk technician troubleshoots why a newly connected PC cannot reach shared printers on the same floor. The cable is good, the switch port is active, but the PC is in VLAN 20 and the printers are in VLAN 10. The uplink trunk only allows VLAN 10. A trunk being up does not mean every VLAN crosses it.
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.
Configure and Manage vSphere Networking — This question tests Configure and Manage vSphere Networking — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: ICMP traffic is blocked by the ESXi firewall. — The administrator can establish an SSH session, which proves that the ESXi host's SSH service is running and that TCP port 22 is reachable from the management workstation. However, the inability to ping the host's IP address (10.10.10.1) indicates that ICMP echo requests are being blocked. By default, the ESXi firewall blocks ICMP traffic, so the most likely cause is that ICMP is filtered by the host firewall.
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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Question Discussion
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