3.4 Given 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?
The concept
A TCP session ends with an agreed four-way closure identified by the FIN flag being set, distinct from an abrupt RESET.
Why this answer
FIN flags set to 1 in both directions before TIME_WAIT describe the four-way graceful closure both peers agree to.
- Correct: this is the described graceful closure behavior.
- BA RESET is identified by the RESET flag and ends the session abruptly, not with FIN exchange.
- CThe three-way handshake opens a connection, it does not close one.
- DAn ACK RESET is a closure caused by unacknowledged retransmissions, not a mutual FIN exchange.
- ESYN retransmission happens during handshake failure, unrelated to session closure.
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 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?
Sample question 3 of 3
A technician troubleshooting a workstation that cannot reach a remote share confirms the TCP SYN packet reached the destination, but the destination sent no response. Which command should be run next on the destination to continue troubleshooting?
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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.