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CompTIA Network+ (N10-009) practice questions

218 free questions with answers and explanations.

Practice test
  1. 201.A network administrator receives reports that several internal web applications are running extremely slowly. Users report that file transfers over the local network are fast, and external internet access is normal. Monitoring tools show high CPU utilization on the server hosting the web applications and high network utilization on the server's specific network interface. What is the MOST likely cause of the slowdown?Network Troubleshooting
  2. 202.A company requires a disaster recovery solution that can restore critical applications within 30 minutes, with minimal data loss (no more than 5 minutes of data loss). Which disaster recovery site tier would best meet these aggressive Recovery Time Objective (RTO) and Recovery Point Objective (RPO) requirements?Network Operations
  3. 203.A network technician is troubleshooting a server that is intermittently losing network connectivity. The server's event logs show 'Link down' and 'Link up' messages occurring frequently. The server is connected via a Cat6 cable to a switch port. A cable tester shows the cable is good, and the switch port has been verified as operational. What is the MOST likely cause of this intermittent issue?Network Troubleshooting
  4. 204.A company is implementing a new VoIP system and requires highly accurate time synchronization across all servers and client devices to ensure proper call logging and billing. The network engineer plans to configure an internal time server that will synchronize directly with a highly accurate external source, such as an atomic clock or GPS receiver. What stratum level would this internal time server typically operate at?Network Operations
  5. 205.A network technician is troubleshooting connectivity issues on a wired network. After running a cable tester, it indicates a 'split pair' fault. What is the most likely symptom users are experiencing due to this cabling issue?Network Security
  6. 206.A security analyst detects unusual outbound traffic from several internal servers to an external IP address known for hosting command-and-control (C2) infrastructure. The traffic is highly encrypted and occurs at irregular intervals. Which type of malware is most likely responsible for this activity?Network Security
  7. 207.A network administrator is designing a new network segment for IoT devices that will primarily use IPv6. The administrator wants these devices to automatically configure their IPv6 addresses without needing a stateful DHCPv6 server for address assignment, but still receive DNS server information. Which IPv6 address assignment method should be configured?Network Operations
  8. 208.A network engineer is configuring a new firewall and wants to ensure that all administrative access attempts, security alerts, and critical system events are sent to a centralized logging server for auditing and analysis. Which protocol should be configured on the firewall to forward these types of messages?Network Operations
  9. 209.A network administrator is troubleshooting slow data transfers between two servers located in different data centers. Both servers are connected to 10 Gbps switch ports. Packet captures show that traffic from Server A to Server B is taking a path through a firewall, while traffic from Server B to Server A is taking a direct, unfirewalled path. What networking issue is MOST likely occurring?Network Troubleshooting
  10. 210.A network technician is setting up VLANs on a new switch. After configuring VLAN 10 for the sales department and VLAN 20 for the marketing department, users in VLAN 10 can communicate with each other, and users in VLAN 20 can communicate with each other. However, users in VLAN 10 cannot access resources in VLAN 20, and vice versa. What is the MOST likely missing configuration?Network Troubleshooting
  11. 211.A network administrator is configuring a new Layer 3 switch to route traffic between VLANs 10, 20, and 30. The switch has a single physical interface connected to a router for external network access. Which of the following configuration elements is required on the Layer 3 switch to enable inter-VLAN routing?Network Implementation
  12. 212.A network administrator is setting up a new point-to-point wireless link between two buildings. After configuring the access points, they observe very low signal strength and poor throughput, despite having clear line-of-sight and the devices being within the specified range. A site survey confirms no major interference. What is a likely cause of this issue?Network Troubleshooting
  13. 213.A network technician is troubleshooting a client workstation that can access internal network resources by IP address but cannot resolve public website names. Pinging external IP addresses works successfully. What is the MOST likely cause of this issue?Network Troubleshooting
  14. 214.A network technician is configuring a new network switch and needs to ensure that the switch can send notifications about critical events, such as port status changes or high CPU utilization, to a central monitoring server. Which protocol should the technician configure on the switch to achieve this real-time alerting capability?Network Operations
  15. 215.A company is implementing a new security policy that requires all network devices to be regularly checked for known vulnerabilities and misconfigurations. Which of the following tools would be most effective for automatically identifying these issues across the network?Network Security
  16. 216.A network engineer is configuring a new switch that will connect to several user workstations. To prevent unauthorized devices from connecting to the network and to ensure that only specific MAC addresses are allowed on certain ports, which security feature should be enabled?Network Security
  17. 217.A network administrator is setting up a new firewall and needs to block all traffic originating from a specific range of internal IP addresses (10.0.0.10 to 10.0.0.15) while allowing all other internal traffic. Which of the following wildcard masks would correctly identify this range for a firewall rule?Networking Concepts
  18. 218.A network engineer is troubleshooting intermittent connectivity issues on a client workstation. The workstation can access local resources but cannot reach the internet. Upon checking the IP configuration, the engineer notices the default gateway address is incorrect. Which layer of the OSI model is primarily impacted by an incorrect default gateway configuration?Networking Concepts