Objective 3.4
220-1202Given a scenario, troubleshoot common personal computer (PC) security issues.
Objective 3.4 sits in Software Troubleshooting, which carries 23% of the A+ Core 2 exam. The questions below are original, written from the official objective title above, and each explanation cites the CompTIA page it rests on.
Objective title verbatim from the official objectives. CompTIA exam page ↗
A worked example
Shown solved, with the whole explanation open: this is what every question here carries.
A technician troubleshooting a workstation that lost network access captures traffic and sees the FIN flag set to 1 in both directions before the port enters TIME_WAIT. What is this session closure called?
Correct.
Checked against learn.microsoft.com, July 2026Concept
A TCP session ends with an agreed four-way closure identified by the FIN flag being set, distinct from an abrupt RESET.
Why D
FIN flags set to 1 in both directions before TIME_WAIT describe the four-way graceful closure both peers agree to.
Source
Microsoft Learn: Troubleshoot TCP/IP connectivity, checked July 2026A four-way closure, where both the sender and receiver agree to close the session, is known as a graceful closure. This is identified by the FIN flag in the TCP header being set to 1.
Now you: objective 3.4 questions
No account needed. The explanation opens when you answer.
Sample question 1 of 3
A user cannot reach a database server. A packet capture shows the source retransmitting a TCP SYN packet three times with no response from the destination. Which command shows the configured SYN retransmission count?
Sample question 2 of 3
A technician collects simultaneous packet captures at the source and destination during a failed file share connection. Retransmitted SYN packets appear only in the source capture, never at the destination. What does this indicate?
Sample question 3 of 3
A cleanup script an administrator ran during remediation deleted the default Documents, Music, Pictures, and Videos libraries, and Windows Media Player now automatically recreates them. What should the administrator do instead to avoid this recreation?
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Read the sources
These are the official pages the questions above cite. Reading them is studying the objective from the primary source, which is what the explanations point you toward anyway.