CompTIA Network+ N10-009 - Domains 3 4 5 Operations Security Troubleshooting

By Jordan Blake · Updated Jul 10, 2026

Questions25
Passing Score75%
Format100% Multiple Choice
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Catalog listing of the 5 preview questions for this quiz.

Question 1

An attacker sends millions of ping requests to a network target from a botnet of compromised hosts, overwhelming the target's bandwidth. What type of attack is this?

Answer choices

  • A. Man-in-the-middle

  • B. DNS poisoning

  • C. DDoS (Distributed Denial of Service)

  • D. ARP spoofing

Question 2

What is the primary difference between an IDS (Intrusion Detection System) and an IPS (Intrusion Prevention System)?

Answer choices

  • A. IDS is hardware-based; IPS is software-based

  • B. IDS only detects and alerts on suspicious traffic; IPS can detect AND actively block/drop malicious traffic inline

  • C. IDS works at Layer 7; IPS works at Layer 3

  • D. IDS requires a SPAN port; IPS does not

Question 3

A network admin runs `show interface GigabitEthernet0/1` on a Cisco router and sees "input errors" and "CRC errors" incrementing. What is the MOST likely physical cause?

Answer choices

  • A. Incorrect VLAN configuration

  • B. Incorrect routing table

  • C. Damaged or low-quality network cable, connector, or cable length exceeding specification

  • D. Duplex mismatch on both sides set to full-duplex

Question 4

A company implements a SIEM (Security Information and Event Management) system. What is the PRIMARY purpose of a SIEM in network operations?

Answer choices

  • A. To configure firewall rules automatically

  • B. To collect, correlate, and analyze log data from multiple sources to identify security threats and compliance violations

  • C. To provide VPN connectivity for remote users

  • D. To manage IP address allocations

Question 5

A company experiences a network outage. Post-incident, they want to identify the root cause and prevent recurrence. Which document is produced?

Answer choices

  • A. Change request

  • B. SLA revision

  • C. Root Cause Analysis (RCA) / Post-incident report

  • D. Business impact analysis