mediumMultiple ChoiceObjective-mapped
FC0-U71 Practice Question: Refer to the exhibit
Exhibit
Refer to the exhibit.
Firewall Rule:
{
"rule": "BlockOutboundSMB",
"protocol": "TCP",
"port": 445,
"action": "Deny",
"direction": "Outbound"
}Refer to the exhibit. A user cannot connect to a network share on a remote server. Based on the firewall rule, what is the most likely cause?
⚠ Common exam trap
Candidates often assume firewall rules only block inbound traffic, but CompTIA FC0-U61 tests the understanding that outbound rules can also prevent client-initiated connections, especially for protocols like SMB that require outbound access to a remote server.
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 firewall is blocking outbound SMB traffic.
The exhibit shows a firewall rule that blocks outbound traffic on port 445, which is used by SMB (Server Message Block) for file sharing. Since the user is trying to connect to a network share on a remote server, the outbound SMB traffic is being blocked, preventing the connection. This is the most likely cause because SMB relies on port 445 for direct TCP communication, and blocking outbound traffic on this port stops the client from initiating the connection.
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 firewall is blocking outbound SMB traffic.
Why this is correct
SMB uses port 445; blocking outbound prevents connecting to the share.
- ✗
The firewall is blocking inbound connections.
Why it's wrong here
The rule blocks outbound traffic, not inbound.
- ✗
The firewall is blocking all network traffic.
Why it's wrong here
The rule is specific to port 445, not all traffic.
- ✗
The firewall is blocking DNS resolution.
Why it's wrong here
DNS uses port 53, not 445.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This FC0-U71 practice question is part of Courseiva's free CompTIA 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 FC0-U71 exam.